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Published Papers and Preprints

2017

Olaf Lechtenfeld and Gleb Zhilin:
A new construction of rational electromagnetic knots
arXiv:1711.11144 [hep-th] ()

Nikolay Kozyrev, Sergey Krivonos, Olaf Lechtenfeld, Armen Nersessian and Anton Sutulin:
N=4 supersymmetric mechanics on curved spaces
arXiv:1711.08734 [hep-th] ()

Nikolay Kozyrev, Sergey Krivonos, Olaf Lechtenfeld, Armen Nersessian and Anton Sutulin:
Curved WDVV equation and N=4 mechanics
arXiv:1710.00884 [hep-th] (Phys. Rev. D 96 (2017) 101702)

Jakob C. Geipel and Marcus Sperling:
Instantons on Calabi-Yau and hyper-Kähler cones
arXiv:1709.01944 [hep-th] (JHEP 1710 (2017) 103)

Tatiana A. Ivanova, Olaf Lechtenfeld and Alexander D. Popov:
Finite-action solutions of Yang-Mills equations on de Sitter dS4 and anti-de Sitter AdS4 spaces
arXiv:1708.06361 [hep-th] (JHEP 1711 (2017) 017)

Vicente Muñoz and Carlos S. Shahbazi:
Orientability of the moduli space of Spin(7)-instantons
arXiv:1707.02998 [math.DG] ()

Jakob C. Geipel, Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Sasakian quiver gauge theories and instantons on cones over round and squashed seven-spheres
arXiv:1706.07383 [hep-th] ()

Francisco Correa and Olaf Lechtenfeld:
PT deformation of angular Calogero models
arXiv:1705.05425 [hep-th] (JHEP 1711 (2017) 122)

Guido Franchetti:
Harmonic spinors on a family of Einstein manifolds
arXiv:1705.02666 [hep-th] ()

Tatiana A. Ivanova, Olaf Lechtenfeld and Alexander D. Popov:
Solutions to Yang-Mills equations on four-dimensional de Sitter space
arXiv:1704.07456 [hep-th] (Phys. Rev. Lett. 119, 061601 (2017))

Oscar de Felice and Jakob Geipel:
Generalised calibrations in AdS backgrounds from exceptional Sasaki-Einstein structures
arXiv:1704.05949 [hep-th] ()

Calin I. Lazaroiu and Carlos S. Shabazi:
Generalized α-attractor models from geometrically finite hyperbolic surfaces
arXiv:1702.06484 [hep-th] ()

Alessio Marrani, Gianfranco Pradisi, Fabio Riccioni and Luca Romano:
Non-supersymmetric magic theories and Ehlers truncations
arXiv:1701.03031 [hep-th] (Int. J. Mod. Phys. A 32 (2017) 1750120)

2016

Sergey Krivonos, Olaf Lechtenfeld and Alexander Sorin:
Hidden symmetries of deformed oscillators
arXiv:1612.07832 [hep-th] (Nucl. Phys. B 924 (2017) 33-46)

Vicente Muñoz and Carlos S. Shahbazi:
Construction of the moduli space of Spin(7)-instantons
arXiv:1611.04127 [hep-th] ()

Andreas Deser and Christian Sämann:
Extended Riemannian geometry I: local double field theory
arXiv:1611.02772 [hep-th] ()

Evgeny Ivanov, Olaf Lechtenfeld and Stepan Sidorov:
SU(2|2) supersymmetric mechanics
arXiv:1609.00490 [hep-th] (JHEP 1611 (2016) 031)

Olaf Lechtenfeld and Alexander D. Popov:
Superstring limit of Yang-Mills theories
arXiv:1608.05331 [hep-th] (Phys. Lett. B 762 (2016) 309-314)

Athanasios Chatzistavrakidis, Andreas Deser, Larisa Jonke and Thomas Strobl:
Strings in singular space-times and their universal gauge theory
arXiv:1608.03250 [hep-th] (Annales Henri Poincare 18 (2017) 2641-2692)

Sergey Krivonos, Olaf Lechtenfeld and Alexander Sorin:
Minimal realization of ℓ-conformal Galilei algebra, Pais-Uhlenbeck oscillators and their deformation
arXiv:1607.03756 [hep-th] (JHEP 1610 (2016) 078)

Athanasios Chatzistavrakidis, Andreas Deser, Larisa Jonke and Thomas Strobl:
Beyond the standard gauging: gauge symmetries of Dirac sigma models
arXiv:1607.00342 [hep-th] (JHEP 1608 (2016) 172)

Anton Galajinsky and Olaf Lechtenfeld:
Superconformal SU(1,1|n) mechanics
arXiv:1606.05230 [hep-th] (JHEP 1609 (2016) 114)

Francisco Correa and Andreas Fring:
Regularized degenerate multi-solitons
arXiv:1605.06371 [hep-th] (JHEP 1609 (2016) 008)

Fech Scen Khoo and Yen Chin Ong:
Lux in obscuro: photon orbits of extremal black holes revisited
arXiv:1605.05774 [hep-th] (Class. Quantum Grav. 33 (2016) 235002)

Jakob C. Geipel:
Sasakian quiver gauge theory on the Aloff-Wallach space X1,1
arXiv:1605.03521 [hep-th] (Nucl. Phys. 916 (2017) 279-303)

Alexander D. Popov:
Superstring theories as low-energy limit of supergroup gauge theories
arXiv:1605.01582 [hep-th] ()

Amihay Hanany and Marcus Sperling:
Coulomb branches for rank 2 gauge groups in 3d N=4 gauge theories
arXiv:1605.00010 [hep-th] (JHEP 1608 (2016) 016)

Francisco Correa, Tigran Hakobyan, Olaf Lechtenfeld and Armen Nersessian:
Spherical Calogero model with oscillator/Coulomb potential: quantum case
arXiv:1604.00027 [hep-th] (Phys. Rev. D 93 (2016) 125009)

Francisco Correa, Tigran Hakobyan, Olaf Lechtenfeld and Armen Nersessian:
Spherical Calogero model with oscillator/Coulomb potential: classical case
arXiv:1604.00026 [hep-th] (Phys. Rev. D 93 (2016) 125008)

Guido Franchetti and Rafael Maldonado:
Monopoles, instantons and the Helmholtz equation
arXiv:1603.09575 [hep-th] (J. Math. Phys. 57 (2016) 073502)

Norbert Dragon:
Currents for arbitrary helicity
arXiv:1601.07825 [hep-th] (unpublished)

Jacob C. Geipel, Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Sasakian quiver gauge theories and instantons on the conifold
arXiv:1601.05719 [hep-th] (Nucl. Phys. B 907 (2016) 445-475)

Nikolay Kozyrev, Sergey Krivonos and Olaf Lechtenfeld:
Higher-derivative superparticle in AdS3 space
arXiv:1601.01906 [hep-th] (Phys. Rev. D 93 (2016) 065014)

2015

Olaf Lechtenfeld:
On asteroid engineering
arXiv:1511.07491 [physics.class-ph] (GJSFR Volume 16 Issue 2 Year 2016, pp. 1-12)

Olaf Lechtenfeld and Suresh Nampuri:
A Calogero formulation for four-dimensional black-hole microstates
arXiv:1509.03256 [hep-th] (Phys. Lett. B 753 (2016) 263-267)

Athanasios Chatzistavrakidis, Andreas Deser and Larisa Jonke:
T-duality without isometry via extended gauge symmetries of 2D sigma models
arXiv:1509.01829 [hep-th] (JHEP 1601 (2016) 154)

Olaf Lechtenfeld and Alexander D. Popov:
Supermembrane limit of Yang-Mills theory
arXiv:1508.06325 [hep-th] (J. Math. Phys. 57 (2016) 023520)

Francisco Correa and Olaf Lechtenfeld:
The tetrahexahedric angular Calogero model
arXiv:1508.04925 [hep-th] (JHEP 1510 (2015) 191)

Olaf Lechtenfeld, Alexander D. Popov, Marcus Sperling and Richard J. Szabo:
Sasakian quiver gauge theories and instantons on cones over lens 5-spaces
arXiv:1506.02786 [hep-th] (Nucl. Phys. B 899 (2015) 848-902)

Alexander D. Popov:
Green-Schwarz superstring as subsector of Yang-Mills theory
arXiv:1506.02175 [hep-th] ()

Francisco Correa, Vit Jakubsky and Mikhail S. Plyushchay:
PT-symmetric invisible defects and confluent Darboux-Crum transformations
arXiv:1505.00991 [hep-th] (Phys. Rev. A 92 (2015) 2, 023839)

Alexander D. Popov:
String theories as the adiabatic limit of Yang-Mills theory
arXiv:1505.07733 [hep-th] (Phys. Rev. D 92 (2015) 045003)

Alexander D. Popov:
Loop groups in Yang-Mills theory
arXiv:1505.06634 [hep-th] (Phys. Lett. B 748 (2015) 439)

Athanasios Chatzistavrakidis, Larisa Jonke and Olaf Lechtenfeld:
Sigma models for genuinely non-geometric backgrounds
arXiv:1505.05457 [hep-th] (JHEP 1511 (2015) 182)

Olaf Lechtenfeld and Alexander D. Popov:
Yang-Mills moduli space in the adiabatic limit
arXiv:1505.05448 [hep-th] (J. Phys. A: Math. Theor. 48 (2015) 425401)

Marcus Sperling:
Instantons on Calabi-Yau cones
arXiv:1505.01755 [hep-th] (Nucl. Phys. B 901 (2015) 354-381)

Eloy Ayón-Beato, Moisés Bravo-Gaete, Francisco Correa, Mokhtar Hassaïne, María Montserrat Juárez-Aubry and Julio Oliva:
First law and anisotropic Cardy formula for three-dimensional Lifshitz black holes
arXiv:1501.01244 [hep-th] (Phys. Rev. D 91 (2015) 6, 064006)

2014

Maike Tormählen:
Yang-Mills solutions and dyons on cylinders over coset spaces with Sasakian structure
arXiv:1412.7069 [hep-th] (Nucl. Phys. B 902 (2016) 162-185)

Andreas Deser:
Star products on graded manifolds and α'-corrections to Courant algebroids from string theory
arXiv:1412.5966 [hep-th] (J. Math. Phys. 56 (2015) 9, 092302)

Evgeny A. Ivanov, Olaf Lechtenfeld and Boris M. Zupnik:
Auxiliary tensor fields for Sp(2,R) self-duality
arXiv:1412.5960 [hep-th] (JHEP 1503 (2015) 123)

Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Sasakian quiver gauge theories and instantons on Calabi-Yau cones
arXiv:1412.4409 [hep-th] (Adv. Theor. Math. Phys. 20 (2016) 821-882)

Andreas Deser, Olaf Lechtenfeld and Alexander D. Popov:
Sigma-model limit of Yang-Mills instantons in higher dimensions
arXiv:1412.4258 [hep-th] (Nucl. Phys. B 894 (2015) 361)

Severin Bunk:
A method of deforming G-structures
arXiv:1410.5849 [math.DG] (J. Geom. Phys. 96 (2015) 72-80)

Adrian Arancibia, Francisco Correa, Vit Jakubsky, Juan Mateos Guilarte and Mikhail S. Plyushchay:
Soliton defects in one-gap periodic system and exotic supersymmetry
arXiv:1410.3565 [hep-th] (Phys. Rev. D 90 (2014) 125041)

Tigran Hakobyan, Olaf Lechtenfeld and Armen Nersessian:
Superintegrability of (generalized) Calogero models with oscillator or Coulomb potential
arXiv:1409.8288 [hep-th] (Phys. Rev. D 90 (2014) 101701(R))

Alexander S. Haupt, Olaf Lechtenfeld and Edvard T. Musaev:
Order α' heterotic domain walls with warped nearly Kähler geometry
arXiv:1409.0548 [hep-th] (JHEP 1411 (2014) 152)

Severin Bunk, Olaf Lechtenfeld, Alexander D. Popov and Marcus Sperling:
Instantons on conical half-flat 6-manifolds
arXiv:1409.0030 [hep-th] (JHEP 1501 (2015) 030)

Ulrich Theis:
Membrane instantons from Toda field theory
arXiv:1408.4632 [hep-th] ()

Athanasios Chatzistavrakidis:
Dynamical phase space from a SO(d,d) matrix model
arXiv:1407.7054 [hep-th] (Phys. Rev. D 90 (2014) 121502)

Severin Bunk, Tatiana A. Ivanova, Olaf Lechtenfeld, Alexander D. Popov and Marcus Sperling:
Instantons on sine-cones over Sasakian manifolds
arXiv:1407.2948 [hep-th] (Phys. Rev. D 90 (2014) 065028)

Athanasios Chatzistavrakidis and Fridrik Freyr Gautason:
Generalized Yang-Mills theory and the D-brane effective action
arXiv:1406.6287 [hep-th] ()

Andreas Deser and Jim Stasheff:
Even symplectic supermanifolds and double field theory
arXiv:1406.3601 [math-ph] ()

Mariana Grana, Jan Louis, Ulrich Theis and Daniel Waldram:
Quantum corrections in string compactifications on SU(3) structure geometries
arXiv:1406.0958 [hep-th] (JHEP 1501 (2015) 057)

James Gray, Alexander S. Haupt and Andre Lukas:
Topological invariants and fibration structure of Complete Intersection Calabi-Yau Four-Folds
arXiv:1405.2073 [hep-th] (JHEP 1409 (2014) 093)

Athanasios Chatzistavrakidis:
Phase space quantization, non-commutativity and the gravitational field
arXiv:1404.2812 [hep-th] (Phys. Rev. D 90 (2014) 024038)

Tigran Hakobyan, David Karakhanyan and Olaf Lechtenfeld:
The structure of invariants in conformal mechanics
arXiv:1402.2288 [hep-th] (Nucl. Phys. B 886 (2014) 399-420)

2013

Francisco Correa, Olaf Lechtenfeld, Mikhail Plyushchay:
Nonlinear supersymmetry in the quantum Calogero model
arXiv:1312.5749 [hep-th] (JHEP 1404 (2014) 151)

Athanasios Chatzistavrakidis, Larisa Jonke and Olaf Lechtenfeld:
Dirac structures on nilmanifolds and coexistence of fluxes
arXiv:1311.4878 [hep-th] (Nucl. Phys. B 883 (2014) 59-82)

Nikolay Kozyrev, Sergey Krivonos, Olaf Lechtenfeld and Armen Nersessian:
Higher-derivative N=4 superparticle in three-dimensional spacetime
arXiv:1311.4540 [hep-th] (Phys. Rev. D 89 (2014) 045013)

Tatiana A. Ivanova, Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Orbifold instantons, moment maps and Yang-Mills theory with sources
arXiv:1310.3028 [hep-th] (Phys. Rev. D 88 (2013) 105026)

Athanasios Chatzistavrakidis, Fridrik Freyr Gautason, George Moutsopoulos and Marco Zagermann:
Effective actions of non-geometric fivebranes
arXiv:1309.2653 [hep-th] (Phys. Rev. D 89 (2014) 066004)

Andrei Domrin, Olaf Lechtenfeld, Román Linares and Marco Maceda:
Exact BPS bound for noncommutative baby Skyrmions
arXiv:1308.6099 [hep-th] (Phys. Lett. B 727 (2013) 303-307)

Nana G. Cabo Bizet, Tatsuo Kobayashi, Damián K. Mayorga Peña, Susha L. Parameswaran, Matthias Schmitz and Ivonne Zavala:
Discrete R-symmetries and anomaly universality in heterotic orbifolds
arXiv:1308.5669 [hep-th] (JHEP 1402 (2014) 098)

Karl-Philip Gemmer and Olaf Lechtenfeld:
Heterotic G2-manifold compactifications with fluxes and fermionic condensates
arXiv:1308.1955 [hep-th] (JHEP 1311 (2013) 182)

Anton Galajinsky and Olaf Lechtenfeld:
On two-dimensional integrable models with a cubic or quartic integral of motion
arXiv:1306.5238 [math-ph] (JHEP 1309 (2013) 113)

Mikhail Feigin, Olaf Lechtenfeld and Alexios Polychronakos:
The quantum angular Calogero-Moser model
arXiv:1305.5841 [math-ph] (JHEP 1307 (2013) 162)

Peter M. Lavrov and Olaf Lechtenfeld:
Gribov horizon beyond the Landau gauge
arXiv:1305.2931 [hep-th] (Phys. Lett. B 725 (2013) 386-388)

Peter M. Lavrov and Olaf Lechtenfeld:
Field-dependent BRST transformations in Yang-Mills theory
arXiv:1305.0712 [hep-th] (Phys. Lett. B 725 (2013) 382-385)

Sergei V. Ketov and Takahiro Terada:
New actions for modified gravity and supergravity
arXiv:1304.4319 [hep-th] (JHEP 1307 (2013) 127)

Marcelo Gonzales, Sadi Khodaee, Olaf Lechtenfeld and Francesco Toppan:
Target duality in N=8 superconformal mechanics and the coupling of dual pairs
arXiv:1303.6732 [hep-th] (J. Math. Phys. 54 (2013) 072902)

Evgeny Ivanov, Olaf Lechtenfeld and Boris Zupnik:
Auxiliary superfields in N=1 supersymmetric self-dual electrodynamics
arXiv:1303.5962 [hep-th] (JHEP 1305 (2013) 113)

James Gray, Alexander S. Haupt and Andre Lukas:
All complete intersection Calabi-Yau four-folds
arXiv:1303.1832 [hep-th] (JHEP 1307 (2013) 070)

Tatiana A. Ivanova, Olaf Lechtenfeld, Alexander D. Popov and Maike Tormählen:
Instantons in six dimensions and twistors
arXiv:1302.5577 [hep-th] (Nucl. Phys. B 882 (2014) 205-218)

Nana G. Cabo Bizet, Tatsuo Kobayashi, Damián K. Mayorga Peña, Susha L. Parameswaran, Matthias Schmitz and Ivonne Zavala:
R-charge conservation and more in factorizable and non-factorizable orbifolds
arXiv:1301.2322 [hep-th] (JHEP 1305 (2013) 076)

2012

C.P. Burgess, L. van Nierop, S. Parameswaran, A. Salvios and M. Williams:
Accidental SUSY: enhanced bulk supersymmetry from brane back-reaction
arXiv:1210.5405 [hep-th] (JHEP 1302 (2013) 120)

Olaf Lechtenfeld and Alexander D. Popov:
Instantons on the six-sphere and twistors
arXiv:1206.4128 [hep-th] (J. Math. Phys. 53 (2012) 123506)

Sergey Fedoruk, Evgeny Ivanov and Olaf Lechtenfeld:
Nahm equations in supersymmetric mechanics
arXiv:1204.4474 [hep-th] (JHEP 1206 (2012) 147)

Luke Barclay, Ruth Gregory, Susha Parameswaran, Gianmassimo Tasinato and Ivonne Zavala:
Lifshitz black holes in IIA supergravity
arXiv:1203.0576 [hep-th] (JHEP 1205 (2012) 122)

Karl-Philip Gemmer, Alexander S. Haupt, Olaf Lechtenfeld, Christoph Nölle and Alexander D. Popov:
Heterotic string plus five-brane systems with asymptotic AdS3
arXiv:1202.5046 [hep-th] (Adv. Theor. Math. Phys. 17 (2013) 771-827)

Athanasios Chatzistavrakidis, Olaf Lechtenfeld and Alexander D. Popov:
Nearly Kähler heterotic compactifications with fermion condensates
arXiv:1202.1278 [hep-th] (JHEP 1204 (2012) 114)

2011

Sergey Fedoruk, Evgeny Ivanov and Olaf Lechtenfeld:
Superconformal mechanics
arXiv:1112.1947 [hep-th] (J. Phys. A: Math. Theor. 45 (2012) 173001) (invited review article)

Tigran Hakobyan, Olaf Lechtenfeld and Armen Nersessian:
The spherical sector of the Calogero model as a reduced matrix model
arXiv:1110.5352 [hep-th] (Nucl. Phys. B 858 (2012) 250-266)

Derek Harland and Christoph Nölle:
Instantons and Killing spinors
arXiv:1109.3552 [hep-th] (JHEP 1203 (2012) 082)

Tigran Hakobyan, Olaf Lechtenfeld, Armen Nersessian, Armen Saghatelian and Vahagn Yeghikyan:
Integrable generalizations of oscillator and Coulomb systems via action-angle variables
arXiv:1108.5189 [hep-th] (Phys. Lett. A 376 (2012) 679-686)

Peter Lavrov, Olaf Lechtenfeld and Alexander Reshetnyak:
Is soft breaking of BRST symmetry consistent?
arXiv:1108.4820 [hep-th] (JHEP 1110 (2011) 043)

Karl-Philip Gemmer, Olaf Lechtenfeld, Christoph Nölle and Alexander D. Popov:
Yang-Mills instantons on cones and sine-cones over nearly-Kähler manifolds
arXiv:1108.3951 [hep-th] (JHEP 1109 (2011) 103)

André Fischer and Richard J. Szabo:
Propagators and matrix basis on noncommutative Minkowski space
arXiv:1106.6166 [hep-th] (Phys. Rev. D 84 (2011) 125010)

Olaf Lechtenfeld and Francesco Toppan:
An N=8 superconformal particle in the half-plane
arXiv:1105.4067 [hep-th] (unpublished)

Alexander S. Haupt, Tatiana A. Ivanova, Olaf Lechtenfeld and Alexander D. Popov:
Chern-Simons flows on Aloff-Wallach spaces and Spin(7)-instantons
arXiv:1104.5231 [hep-th] (Phys. Rev. D 83 (2011) 105028)

2010

Sergey Krivonos and Olaf Lechtenfeld:
Many-particle mechanics with D(2,1;α) superconformal symmetry
arXiv:1012.4639 [hep-th] (JHEP 1102 (2011) 042)

Christoph Nölle:
Homogeneous heterotic supergravity solutions with linear dilaton
arXiv:1011.2873 [hep-th] (J. Phys. A: Math. Theor. 45 (2012) 045402)

Olaf Lechtenfeld, Konrad Schwerdtfeger and Johannes Thürigen:
N=4 multi-particle mechanics, WDVV equation and roots
arXiv:1011.2207 [hep-th] (SIGMA 7 (2011) 023)

Tigran Hakobyan, Olaf Lechtenfeld, Armen Nersessian and Armen Saghatelian:
Invariants of the spherical sector in conformal mechanics
arXiv:1008.2912 [hep-th] (J. Phys. A: Math. Theor. 44 (2011) 055205)

Olaf Lechtenfeld, Christoph Nölle and Alexander D. Popov:
Heterotic compactifications on nearly Kähler manifolds
arXiv:1007.0236 [hep-th] (JHEP 1009 (2010) 074)

Irina Bauer, Tatiana A. Ivanova, Olaf Lechtenfeld and Felix Lubbe:
Yang-Mills instantons and dyons on homogeneous G2-manifolds
arXiv:1006.2388 [hep-th] (JHEP 1010 (2010) 044)

Olaf Lechtenfeld, Armen Nersessian and Vahagn Yeghikyan:
Action-angle variables for dihedral systems on the circle
arXiv:1005.0464 [hep-th] (Phys. Lett. A 374 (2010) 4647-4652)

Johannes Brödel and Song He:
Dual conformal constraints and infrared equations from global residue theorems in N=4 SYM theory
arXiv:1004.2400 [hep-th] (JHEP 1006 (2010) 054)

Olaf Lechtenfeld and Marco Maceda:
The noncommutative Ward metric
arXiv:1001.3416 [hep-th] (SIGMA 6 (2010) 045)

Sergey Krivonos, Olaf Lechtenfeld and Anton Sutulin:
N=4 supersymmetry and the BPST instanton
arXiv:1001.2659 [hep-th] (Phys. Rev. D 81 (2010) 085021)

2009

Sergey Fedoruk, Evgeny Ivanov and Olaf Lechtenfeld:
New D(2,1;α) mechanics with spin variables
arXiv:0912.3508 [hep-th] (JHEP 1004 (2010) 129)

Johannes Brödel and Lance Dixon:
R4-counterterm and E7(7)-symmetry in maximal supergravity
arXiv:0911.5704 [hep-th] (JHEP 1005 (2010) 003)

I.L. Buchbinder, E.A. Ivanov, O. Lechtenfeld, N.G. Pletnev, I.B. Samsonov and B.M. Zupnik:
Quantum N=3, d=3 Chern-Simons matter theories in harmonic superspace
arXiv:0909.2970 [hep-th] (JHEP 0910 (2009) 075)

Derek Harland, Tatiana A. Ivanova, Olaf Lechtenfeld and Alexander D. Popov:
Yang-Mills flows on nearly Kähler manifolds and G2-instantons
arXiv:0909.2730 [hep-th] (Commun. Math. Phys. 300 (2010) 185-204)

Thorsten Rahn:
Yang-Mills equations of motion for the Higgs sector of SU(3)-equivariant quiver gauge theories
arXiv:0908.4275 [hep-th] (J. Math. Phys. 51 (2010) 072302)

Tigran Hakobyan, Sergey Krivonos, Olaf Lechtenfeld and Armen Nersessian:
Hidden symmetries of integrable conformal mechanical systems
arXiv:0908.3290 [hep-th] (Phys. Lett. A 374 (2010) 801-806)

Olaf Lechtenfeld and Kirill Polovnikov:
A new class of solutions to the WDVV equation
arXiv:0907.2244 [hep-th] (Phys. Lett. A 374 (2010) 504-506)

Anton Galajinsky and Olaf Lechtenfeld:
Harmonic N=2 mechanics
arXiv:0907.2242 [hep-th] (Phys. Rev. D 80 (2009) 065012)

Sergey Krivonos and Olaf Lechtenfeld:
SU(2) reduction in N=4 supersymmetric mechanics
arXiv:0906.2469 [hep-th] (Phys. Rev. D 80 (2009) 045019)

Sergey Fedoruk, Evgeny Ivanov and Olaf Lechtenfeld:
OSp(4|2) superconformal mechanics
arXiv:0905.4951 [hep-th] (JHEP 0908 (2009) 081)

Theodora Ioannidou and Olaf Lechtenfeld:
Noncommutative baby Skyrmions
arXiv:0905.4077 [hep-th] (Phys. Lett. B 678 (2009) 508-511)

Derek Harland and Seçkin Kürkçüoglu:
Equivariant reduction of Yang-Mills theory over the fuzzy sphere and the emergent vortices
arXiv:0905.2338 [hep-th] (Nucl. Phys. B 821 (2009) 380-398)

Tatiana A. Ivanova, Olaf Lechtenfeld, Alexander D. Popov and Thorsten Rahn:
Instantons and Yang-Mills flows on coset spaces
arXiv:0904.0654 [hep-th] (Lett. Math. Phys. 89 (2009) 231-247)

Derek Harland:
Kinks, chains, and loop groups in the CPn sigma models
arXiv:0902.2303 [hep-th] (J. Math. Phys. 50 (2009) 122902)

Kirsten Vogeler and Michael Flohr:
On a logarithmic deformation of the supersymmetric bc-system on curved manifolds
arXiv:0902.0729 [hep-th] (J. Math. Phys. 50 (2009) 112305)

Johannes Brödel and Bernhard Wurm:
New twistor string theories revisited
arXiv:0902.0550 [hep-th] (Phys. Lett. B 675 (2009) 463-468)

Derek Harland and Richard S. Ward:
Dynamics of periodic monopoles
arXiv:0901.4428 [hep-th] (Phys. Lett. B 675 (2009) 262-266)

2008

Sergey Krivonos, Olaf Lechtenfeld and Kirill Polovnikov:
N=4 superconformal n-particle mechanics via superspace
arXiv:0812.5062 [hep-th] (Nucl. Phys. B 817 [PM] (2009) 265-283)

Sergey Fedoruk, Evgeny Ivanov and Olaf Lechtenfeld:
Supersymmetric Calogero models by gauging
arXiv:0812.4276 [hep-th] (Phys. Rev. D 79 (2009) 105015)

I.L. Buchbinder, E.A. Ivanov, O. Lechtenfeld, N.G. Pletnev, I.B. Samsonov and B.M. Zupnik:
ABJM models in N=3 harmonic superspace
arXiv:0811.4774 [hep-th] (JHEP 0903 (2009) 096)

André Fischer and Olaf Lechtenfeld:
The noncommutative sine-Gordon breather
arXiv:0811.1048 [hep-th] (J. Math. Phys. 50 (2009) 095201)

André Fischer and Richard J. Szabo:
Duality covariant quantum field theory on noncommutative Minkowski space
arXiv:0810.1195 [hep-th] (JHEP 0902 (2009) 031)

Jonatan Lenells and Olaf Lechtenfeld:
On the N=2 supersymmetric Camassa-Holm and Hunter-Saxton equations
arXiv:0809.0077 [nlin.SI] (J. Math. Phys. 50 (2009) 012704)

Seçkin Kürkçüoglu:
Noncommutative Q-lumps
arXiv:0808.3745 [hep-th] (Phys. Rev. D 78 (2008) 105018)

Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
SU(3)-equivariant quiver gauge theories and nonabelian vortices
arXiv:0806.2791 [hep-th] (JHEP 0808 (2008) 093)

Tatiana A. Ivanova and Olaf Lechtenfeld:
Yang-Mills instantons and dyons on group manifolds
arXiv:0806.0394 [hep-th] ( Phys. Lett. B 670 (2008) 91-94)

Alexander D. Popov:
Bounces/dyons in the plane wave matrix model and SU(n) Yang-Mills theory
arXiv:0804.3845 [hep-th] (Mod. Phys. Lett. A 24 (2009) 349-359)

Seçkin Kürkçüoglu:
Noncommutative nonlinear sigma models and integrability
arXiv:0804.3782 [hep-th] (Phys. Rev. D 78 (2008) 065020)

Ioseph L. Buchbinder, Olaf Lechtenfeld and Igor B. Samsonov:
N=4 superparticle and super Yang-Mills theory in USp(4) harmonic superspace
arXiv:0804.3063 [hep-th] (Nucl. Phys. B 802 (2008) 208-246)

Alexander D. Popov:
Explicit non-abelian monopoles and instantons in SU(N) pure Yang-Mills theory
arXiv:0803.3320 [hep-th] (Phys. Rev. D 77 (2008) 125026)

Sergei V. Ketov and Olaf Lechtenfeld:
Non-anticommutative solitons
arXiv:0803.2867 [hep-th] (Phys. Lett. B 663 (2008) 353-359)

Anton Galajinsky, Olaf Lechtenfeld and Kirill Polovnikov:
N=4 mechanics, WDVV equations and roots
arXiv:0802.4386 [hep-th] (JHEP 0903 (2009) 113)

Ioseph L. Buchbinder and Igor B. Samsonov:
N=3 superparticle model
arXiv:0801.4907 [hep-th] (Nucl. Phys. B 802 (2008) 180-207)

Michael Flohr and Hendrik Adorf:
On factorization constraints for branes in the H3+ model
arXiv:0801.2711 [hep-th] (Int. J. Mod. Phys A 23 (2008) 3963-4010)

Alexander D. Popov:
Non-abelian vortices on Riemann surfaces: an integrable case
arXiv:0801.0808 [hep-th] (Lett. Math. Phys. 84 (2008) 139-148)

2007

Alexander D. Popov:
Integrability of vortex equations on Riemann surfaces
arXiv:0712.1756 [hep-th] (Nucl. Phys. B 821 (2009) 452-466)

Stefano Bellucci, Sergey Krivonos, Olaf Lechtenfeld and Andrey Shcherbakov:
Superfield formulation of nonlinear N=4 supermultiplets
arXiv:0710.3832 [hep-th] (Phys. Rev. D 77 (2008) 045026)

Anne-Ly Do and Michael Flohr:
Towards the construction of local logarithmic conformal field theories
arXiv:0710.1783 [hep-th] (Nucl. Phys. B 802 (2008) 475-493)

Christian Gutschwager, Tatiana A. Ivanova and Olaf Lechtenfeld:
Scattering of noncommutative waves and solitons in a supersymmetric chiral model in 2+1 dimensions
arXiv:0710.0079 [hep-th] (JHEP 0711 (2007) 052)

I.L. Buchbinder, E.A. Ivanov, O. Lechtenfeld, I.B. Samsonov and B.M. Zupnik:
Gauge theory in deformed N=(1,1) superspace
arXiv:0709.3770 [hep-th] (Phys. Part. Nucl. 39 (2008) 759-797)

Seçkin Kürkçüoglu and Olaf Lechtenfeld:
Quantum aspects of the noncommutative sine-Gordon model
arXiv:0708.1310 [hep-th] (JHEP 0709 (2007) 020)

Francois Delduc, Olaf Lechtenfeld and Alexander Sorin:
N=2 supersymmetric unconstrained matrix GNLS hierarchies are consistent
arXiv:0708.1125 [nlin.SI] (Lett. Math. Phys. 84 (2008) 109-122)

Anton Galajinsky, Olaf Lechtenfeld and Kirill Polovnikov:
N=4 superconformal Calogero models
arXiv:0708.1075 [hep-th] (JHEP 0711 (2007) 008)
(also talk by O.L. at JINR workshop ``Supersymmetries and Quantum Symmetries'', Dubna, Russia, 30 July-04 Aug 2007; short version appears in the Proceedings)

Hendrik Adorf and Michael Flohr:
Continuously crossing u=z in the H3+ boundary cft
arXiv:0707.1463 [hep-th] (JHEP 0711 (2007) 024)

Aiyalam P. Balachandran, Kumar S. Gupta and Seçkin Kürkçüoglu:
Interacting quantum topologies and the quantum Hall effect
arXiv:0707.1219 [hep-th] (Int. J. Mod. Phys. A 23 (2008) 1327-1336)

Annekathrin Müller-Lohmann:
On a possible interpretation of fusion in stochastic Löwner evolution
arXiv:0707.0443 [hep-th] ()

Evgeny Ivanov, Olaf Lechtenfeld and Anton Sutulin:
Hierarchy of N=8 mechanics models
arXiv:0705.3064 [hep-th] (Nucl. Phys. B 790 [PM] (2008) 493-523)

Joachim Escher, Olaf Lechtenfeld and Zhaoyang Yin:
Well-posedness and blow-up phenomena for the 2-component Camassa-Holm equation
(Discrete Contin. Dyn. Syst. A 19 (2007) 493-513)

Michael Flohr and Holger Knuth:
On Verlinde-like formulas in cp,1 logarithmic conformal field theories
arXiv:0705.0545 [math-ph] ()

Olaf Lechtenfeld and Alexander D. Popov:
Noncommutative solitons in a supersymmetric chiral model in 2+1 dimensions
arXiv:0704.0530 [hep-th] (JHEP 0706 (2007) 065)

Johannes Brödel, Tatiana Ivanova and Olaf Lechtenfeld:
Construction of noncommutative instantons in 4k dimensions
hep-th/0703009 (Mod. Phys. Lett. A 23 (2008) 179-189)

Hendrik Adorf and Michael Flohr:
On the various types of D-branes in the boundary H3+ model
hep-th/0702158 (superseded by arXiv:0801.2711)

Alexander D. Popov:
Sigma models with N=8 supersymmetries in 2+1 and 1+1 dimensions
hep-th/0702106 (Phys. Lett. B 647 (2007) 509-514)

2006

Michael Flohr, Carsten Grabow and Michael Koehn:
Fermionic expressions for the characters of cp,1 logarithmic conformal field theories
hep-th/0611241 (Nucl. Phys. B 768 (2007) 263-276)

Alexander D. Popov and Martin Wolf:
Hidden symmetries and integrable hierarchy of the N=4 supersymmetric Yang-Mills equations
hep-th/0608225 (Commun. Math. Phys. 275 (2007) 685-708)

I.L. Buchbinder, O. Lechtenfeld and I.B. Samsonov:
Vector-multiplet effective action in the non-anticommutative charged hypermultiplet model
hep-th/0608048 (Nucl. Phys. B 758 (2006) 185-203)

Anton Galajinsky, Olaf Lechtenfeld and Kirill Polovnikov:
Calogero models and nonlocal conformal transformations
hep-th/0607215 (Phys. Lett. B 643 (2006) 221-227)

Kirsten Vogeler and Michael Flohr:
Pure gauge SU(2) Seiberg-Witten theory and modular forms
hep-th/0607142 (J. Math. Phys. 48 (2007) 083505)

Peter van Nieuwenhuizen, Anton Rebhan, Dmitri V. Vassilevich and Robert Wimmer:
Boundary terms in supergravity and supersymmetry
hep-th/0606075 (Int. J. Mod. Phys. D 15 (2006) 1643-1658)

Alexandra De Castro and Leonardo Quevedo:
Non-singlet Q-deformed N=(1,1) and N=(1,1/2) U(1) actions
hep-th/0605187 (Phys. Lett. B 639 (2006) 117-123)

Michael Klawunn, Olaf Lechtenfeld and Stefan Petersen:
Moduli-space dynamics of noncommutative abelian sigma-model solitons
hep-th/0604219 (JHEP 0606 (2006) 028)

Holger Eberle and Michael Flohr:
Virasoro representations and fusion for general augmented minimal models
hep-th/0604097 (J. Phys. A 39 (2006) 15245-15286)

Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Rank two quiver gauge theory, graded connections and noncommutative vortices
hep-th/0603232 (JHEP 0609 (2006) 054)

Tatiana A. Ivanova and Olaf Lechtenfeld:
Noncommutative instantons on CPn
hep-th/0603125 (Phys. Lett. B 639 (2006) 407-410)

Michael Flohr and Julia Voelskow:
Indecomposable representations in Z_n symmetric b,c ghost systems via deformations of the Virasoro field
hep-th/0602056 (unpublished)

Anton Rebhan, Peter van Nieuwenhuizen and Robert Wimmer:
Quantum mass and central charge of supersymmetric monopoles: Anomalies, index theorems, and surface terms
hep-th/0601029 (JHEP 0606 (2006) 056)

2005

Holger Eberle and Michael Flohr:
Notes on generalised nullvectors in logarithmic CFT
hep-th/0512254 (Nucl. Phys. B 741 (2006) 441-466)

I.L. Buchbinder, E.A. Ivanov, O. Lechtenfeld, I.B. Samsonov and B.M. Zupnik:
Renormalizability of non-anticommutative N=(1,1) theories with singlet deformation
hep-th/0511234 (Nucl. Phys. B 740 (2006) 358-385)

Olaf Lechtenfeld and Christian Sämann:
Matrix models and D-branes in twistor string theory
hep-th/0511130 (JHEP 0603 (2006) 002)

Michael Flohr and Annekathrin Müller-Lohmann:
Notes on non-trivial and logarithmic CFTs with c=0
hep-th/0510096 (J. Stat. Mech. 0604 (2006) P002)

Alexandra De Castro, Evgeny Ivanov, Olaf Lechtenfeld and Leonardo Quevedo:
Non-singlet Q-deformation of the N=(1,1) vector multiplet in harmonic superspace
hep-th/0510013 (Nucl. Phys. B 747 (2006) 1-24)

Michael Flohr and Matthias Gaberdiel:
Logarithmic torus amplitudes
hep-th/0509075 (J. Phys. A 39 (2006) 1955-1968)

Christian Sämann:
On the mini-superambitwistor space and N=8 super Yang-Mills theory
hep-th/0508137 (Advances in Mathematical Physics, vol. 2009, Article ID 784215)

Chong-Sun Chu and Olaf Lechtenfeld:
Emergence of time from dimensional reduction in noncommutative geometry
hep-th/0508055 (Mod. Phys. Lett. A 21 (2006) 639-647)

Nils Carqueville and Michael Flohr:
Nonmeromorphic operator product expansion and C2-cofiniteness for a family of W-algebras
hep-th/0508015 (J. Phys. A 39 (2006) 951-966)

Michael Flohr and Annekathrin Müller-Lohmann:
Conformal field theory properties of two-dimensional percolation
hep-th/0507211 (J. Stat. Mech. 0512 (2005) P004)

Chong-Sun Chu and Olaf Lechtenfeld:
Time-space noncommutative abelian solitons
hep-th/0507062 (Phys. Lett. B 625 (2005) 145-155)

Matthias Ihl and Christian Sämann:
Twisted supersymmetry and non-anticommutative superspace
hep-th/0506057 (JHEP 0601 (2006) 065)

Alexander D. Popov, Christian Sämann and Martin Wolf:
The topological B-model on a mini-supertwistor space and supersymmetric Bogomolny monopole equations
hep-th/0505161 (JHEP 0510 (2005) 058)

Michael Flohr and Marco Krohn:
Four-point functions in logarithmic conformal field theories
hep-th/0504025 (Nucl. Phys. B 743 (2006) 276-306)

Alexander D. Popov and Richard J. Szabo:
Quiver gauge theory of nonabelian vortices and noncommutative instantons in higher dimensions
hep-th/0504025 (J. Math. Phys. 47 (2006) 012306)

A. Rebhan, R. Schofbeck, P. van Nieuwenhuizen and R. Wimmer:
BPS saturation of the N=4 monopole by infinite composite-operator renormalization
hep-th/0502221 (Phys. Lett. B 632 (2006) 145-150)

Robert Wimmer:
D0-D4 brane tachyon condensation to a BPS state and its excitation spectrum in noncommutative super Yang-Mills theory
hep-th/0502158 (JHEP 0505 (2005) 022)

Tatiana A. Ivanova and Olaf Lechtenfeld:
Noncommutative instantons in 4k dimensions
hep-th/0502117 (Phys. Lett. B 612 (2005) 65-74)

2004

Martin Wolf:
On hidden symmetries of a super gauge theory and twistor string theory
hep-th/0412163 (JHEP 0502 (2005) 018)

Alexander D. Popov:
On explicit point multi-monopoles in SU(2) gauge theory
hep-th/0412042 (J. Math. Phys. 46 (2005) 073506)

Andrei V. Domrin, Olaf Lechtenfeld and Stefan Petersen:
Sigma-model solitons in the noncommutative plane: construction and stability analysis
hep-th/0412001 (JHEP 0503 (2005) 045)

Christian Sämann:
The topological B-model on fattened complex manifolds and subsectors of N=4 self-dual Yang-Mills theory
hep-th/0410292 (JHEP 0501 (2005) 042)

Cecilia Albertsson, Ulf Lindström and Maxim Zabzine:
T-duality for the sigma model with boundaries
hep-th/0410217 (JHEP 0412 (2004) 056)

Nikolas Akerblom and Michael Flohr:
Explicit formulas for the scalar modes in Seiberg-Witten theory with an application to the Argyres-Douglas point
hep-th/0409253 (JHEP 0502 (2005) 057)

Evgeny Ivanov, Olaf Lechtenfeld and Boris Zupnik:
Non-anticommutative deformation of N=(1,1) hypermultiplets
hep-th/0408146 (Nucl. Phys. B 707 (2005) 69-86)

Alexander D. Popov and Martin Wolf:
Topological B-model on weighted projective spaces and self-dual models in four dimensions
hep-th/0406224 (JHEP 0409 (2004) 007)

Olaf Lechtenfeld and Alexander D. Popov:
Supertwistors and cubic string field theory for open N=2 strings
hep-th/0406179 (Phys. Lett. B 598 (2004) 113-120)

Olaf Lechtenfeld, Liuba Mazzanti, Silvia Penati, Alexander D. Popov and Laura Tamassia:
Integrable noncommutative sine-Gordon model
hep-th/0406065 (Nucl. Phys. B 705 (2005) 477-503)

Stefano Bellucci, Evgeny Ivanov, Sergey Krivonos and Olaf Lechtenfeld:
ABC of N=8, d=1 supermultiplets
hep-th/0406015 (Nucl. Phys. B 699 (2004) 226-252)

Alexander D. Popov and Christian Sämann:
On supertwistors, the Penrose-Ward transform and N=4 super Yang-Mills theory
hep-th/0405123 (Adv. Theor. Math. Phys. 9 (2005) 931-998)

Alexandra De Castro, Leonardo Quevedo and Alvaro Restuccia:
N=2 super-Born-Infeld from partially broken N=3 supersymmetry in d=4
hep-th/0405062 (JHEP 0406 (2004) 055)

Sergio Ferrara, Evgeny Ivanov, Olaf Lechtenfeld, Emery Sokatchev and Boris Zupnik:
Non-anticommutative chiral singlet deformation of N=(1,1) gauge theory
hep-th/0405049 (Nucl. Phys. B 704 (2005) 154-180)

Tatiana A. Ivanova, Olaf Lechtenfeld and Helge Müller-Ebhardt:
Noncommutative moduli for multi-instantons
hep-th/0404127 (Mod. Phys. Lett. A 19 (2004) 2419-2430)

Christian Sämann and Martin Wolf:
Constraint and super Yang-Mills equations on the deformed superspace Rh(4|16)
hep-th/0401147 (JHEP 0403 (2004) 048)

Olaf Lechtenfeld and Alexander S. Sorin:
A note on fermionic flows of the N=(1|1) supersymmetric Toda lattice hierarchy
nlin.SI/0401029 (J. Nonlinear Math. Phys. 11 (2004) 294-296)

Anton Rebhan, Peter van Nieuwenhuizen and Robert Wimmer:
A new anomaly in the central charge of the N=2 monopole
hep-th/0401116 (Phys. Lett. B 594 (2004) 234-240)

2003

Stefano Bellucci, Evgeny Ivanov, Sergey Krivonos and Olaf Lechtenfeld:
N=8 superconformal mechanics
hep-th/0312322 (Nucl. Phys. B 684 (2004) 321-350)

Matthias Ihl, Alexander Kling and Sebastian Uhlmann:
String field theory projectors for fermions of integral weight
hep-th/0312314 (JHEP 0403 (2004) 002)

Manfred Herbst, Alexander Kling and Maximilian Kreuzer:
Cyclicity of nonassociative products on D-branes
hep-th/0312043 (JHEP 0403 (2004) 003)

Evgeny Ivanov, Sergey Krivonos and Olaf Lechtenfeld:
N=4, d=1 supermultiplets from nonlinear realizations of D(2,1;α)
hep-th/0310299 (Class. Quantum Grav. 21 (2004) 1031-1050)

Olaf Lechtenfeld, Alexander D. Popov and Richard J. Szabo:
Noncommutative instantons in higher dimensions, vortices and topological K-cycles
hep-th/0310267 (JHEP 0312 (2003) 022)

Evgeny Ivanov, Olaf Lechtenfeld and Boris Zupnik:
Nilpotent deformations of N=2 superspace
hep-th/0308012 (JHEP 0402 (2004) 012)

Evgeny Ivanov and Olaf Lechtenfeld:
N=4 supersymmetric mechanics in harmonic superspace
hep-th/0307111 (JHEP 0309 (2003) 073)

Alexander Kling and Sebastian Uhlmann:
String field theory vertices for fermions of integral weight
hep-th/0306254 (JHEP 0307 (2003) 061)

Olaf Lechtenfeld and Alexander D. Popov:
Noncommutative monopoles and Riemann-Hilbert problems
hep-th/0306263 (JHEP 0401 (2004) 069)

Tatiana A. Ivanova and Olaf Lechtenfeld:
Noncommutative multi-instantons on R2n x S2
hep-th/0305195 (Phys. Lett. B 567 (2003) 107-115)

Alexander D. Popov, Armen G. Sergeev and Martin Wolf:
Seiberg-Witten monopole equations on noncommutative R4
hep-th/0304263 (J. Math. Phys. 44 (2003) 4527-4554)

2002

Evgeny Ivanov, Sergey Krivonos and Olaf Lechtenfeld:
New variant of N=4 superconformal mechanics
hep-th/0212303 (JHEP 0303 (2003) 014)

Marco Krohn and Michael Flohr:
Ghost systems revisited: Modified Virasoro generators and logarithmic conformal field theories
hep-th/0212016 (JHEP 0301 (2003) 020)

Matthias Ihl and Sebastian Uhlmann:
Noncommutative extended waves and soliton-like configurations in N=2 string theory
hep-th/0211263 (Int. J. Mod. Phys. A 18 (2003) 4889-4932)

Zalan Horvath, Olaf Lechtenfeld and Martin Wolf:
Noncommutative instantons via dressing and splitting approaches
hep-th/0211041 (JHEP 0212 (2002) 060)

Alexander Kling, Olaf Lechtenfeld, Alexander D. Popov and Sebastian Uhlmann:
On nonperturbative solutions of superstring field theory
hep-th/0209186 (Phys. Lett. B 551 (2003) 193-201)

Filip Franco-Sollova and Tatiana Ivanova:
On noncommutative merons and instantons
hep-th/0209153 (J. Phys. A 36 (2003) 4207-4219)

Michael Flohr and Klaus Osterloh:
A novel cft approach to bulk wave functions in the fractional quantum Hall effect
cond-mat/0208429 (Phys. Rev. B67 (2003) 235316)

Andreas Bredthauer:
Boundary states and symplectic fermions
hep-th/0207181 (Phys. Lett. B 551 (2003) 378-386)

Martin Wolf:
Soliton-antisoliton scattering configurations in a noncommutative sigma model in 2+1 dimensions
hep-th/0204185 (JHEP 0206 (2002) 055)

Olaf Lechtenfeld, Alexander D. Popov and Sebastian Uhlmann:
Exact solutions of Berkovits' string field theory
hep-th/0204155 (Nucl. Phys. B 637 (2002) 119-142)

Andreas Bredthauer and Michael Flohr:
Boundary states in c=-2 logarithmic conformal field theory
hep-th/0204154 (Nucl. Phys. B 639 (2002) 450-470)

Olaf Lechtenfeld and Warren Siegel:
Light-cone gauge for N=2 strings
hep-th/0204073 (Russ. Phys. J. 45 (2002) 712-718)

Stig Bieling:
Interaction of noncommutative plane waves in 2+1 dimensions
hep-th/0203269 (J. Phys. A 35 (2002) 6281-6291)

2001

Olaf Lechtenfeld and Alexander D. Popov:
Noncommutative 't Hooft instantons
hep-th/0109209 (JHEP 0203 (2002) 040)

Olaf Lechtenfeld and Alexander D. Popov:
Scattering of noncommutative solitons in 2+1 dimensions
hep-th/0108118 (Phys. Lett. B 523 (2001) 178-184)

Klaus Jünemann and Bernd Spendig:
D-brane scattering of N=2 strings
hep-th/0108069 (Phys. Lett. B 520 (2001) 163-169)

Michael Flohr:
Operator product expansion in logarithmic conformal field theory
hep-th/0107242 (Nucl. Phys. B 634 (2002) 511-545)

Olaf Lechtenfeld and Alexander D. Popov:
Noncommutative multi-solitons in 2+1 dimensions
hep-th/0106213 (JHEP 0111 (2001) 040)

Olaf Lechtenfeld, Alexander D. Popov and Bernd Spendig:
Noncommutative solitons in open N=2 string theory
hep-th/0103196 (JHEP 0106 (2001) 011)

Stefano Bellucci, Anton Galajinsky and Olaf Lechtenfeld:
A heterotic N=2 string with space-time supersymmetry
hep-th/0103049 (Nucl. Phys. B 609 (2001) 410-428)

2000

Olaf Lechtenfeld, Alexander D. Popov and Bernd Spendig:
Open N=2 strings in a B-field background and noncommutative self-dual Yang-Mills
hep-th/0012200 (Phys. Lett. B 507 (2001) 317-326)

Evgeny Ivanov, Sergey Krivonos, Olaf Lechtenfeld and Boris Zupnik:
Partial spontaneous breaking of two-dimensional supersymmetry
hep-th/0012199 (Nucl. Phys. B 600 (2001) 235-271)

Olaf Lechtenfeld and Alexander D. Popov:
On the integrability of covariant field theory for the open N=2 string
hep-th/0009144 (Phys. Lett. B 494 (2000) 148-154)

Olaf Lechtenfeld and Alexander Sorin:
Hidden N=(2|2) supersymmetry of the N=(1|1) supersymmetric Toda lattice hierarchy
nlin.SI/0007009 (J. Nonlinear Math. Phys. 8 (2001) 183-195)

Tatiana A. Ivanova and Olaf Lechtenfeld:
Hidden symmetries of the open N=2 string
hep-th/0007049 (Int. J. Mod. Phys. A 16 (2001) 303-329)

Gordon Chalmers, Olaf Lechtenfeld and Bernd Niemeyer:
N=2 quantum string scattering
hep-th/0007020 (Nucl. Phys. B 591 (2000) 1-38)

Evgeny Ivanov, Sergey Krivonos and Olaf Lechtenfeld:
Double-vector multiplet and partially broken N=4, d=3 supersymmetry
hep-th/0006017 (Phys. Lett. B 487 (2000) 192-200)

Thomas Böttner, Sergei V. Ketov and Thomas Lau:
Manifestly N=3 supersymmetric Euler-Heisenberg action in light-cone superspace
hep-th/0002134 (Mod. Phys. Lett. A 15 (2000) 587-594)

1999

Olaf Lechtenfeld and Alexander D. Popov:
Closed N=2 strings: picture-changing, hidden symmetries and SDG hierarchy
hep-th/9912154 (Int. J. Mod. Phys. A 15 (2000) 4191-4237)

Olaf Lechtenfeld and Alexander Sorin:
Real forms of the complex twisted N=2 supersymmetric Toda chain hierarchy in real N=1 and twisted N=2 superspaces
solv-int/9912010 (J. Nonlinear Math. Phys. 7 (2000) 433-444)

Klaus Jünemann and Olaf Lechtenfeld:
Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string
hep-th/9912016 (Phys. Lett. B 474 (2000) 58-66)

Stefano Bellucci and Anton Galajinsky:
Consistent BRST for infinitely reducible first class constraints
hep-th/9909190 (Phys. Rev. D 62 (2000) 027501)

Sergei V. Ketov:
Exact low-energy effective actions for hypermultiplets in four dimensions
hep-th/9909177 (unpublished)

Olaf Lechtenfeld and Alexander Sorin:
Supersymmetric KP hierarchy in N=1 superspace and its N=2 reductions
solv-int/9907021 (Nucl. Phys. B 566 [PM] (2000) 489-510)

Sergei V. Ketov:
Exact hypermultiplet dynamics in four dimensions
hep-th/9904196 (Phys. Lett. B 469 (1999) 136-144)

Anton Galajinsky and Olaf Lechtenfeld:
Towards a stringy extension of self-dual super Yang-Mills
hep-th/9903149 (Phys. Lett. B 460 (1999) 288-294)

Klaus Jünemann, Olaf Lechtenfeld and Alexander D. Popov:
Non-local symmetries of the closed N=2 string
hep-th/9901164 (Nucl. Phys. B 548 (1999) 449-474)

1998

Olaf Lechtenfeld and Boris Zupnik:
Manifestly invariant actions for harmonic self-dual gauge theory
hep-th/9812244 (unpublished)

Sergei V. Ketov:
Born-Infeld-Goldstone superfield actions for gauge-fixed D-5- and D-3-branes in 6d
hep-th/9812051 (Nucl. Phys. B 553 (1999) 250-282)

Anton V. Galajinsky and D.M. Gitman:
On minimal coupling of the ABC-superparticle to supergravity background
hep-th/9811014 (Phys. Rev. D 59 (1999) 047504)

Olaf Lechtenfeld and Alexander Sorin:
Fermionic flows and tau function of the N=(1|1) superconformal Toda lattice hierarchy
solv-int/9810009 (Nucl. Phys. B 557 [PM] (1999) 535-547)

Sergei V. Ketov:
A manifestly N=2 supersymmetric Born-Infeld action
hep-th/9809121 (Mod. Phys. Lett. A 14 (1999) 501-510)

Sergei V. Ketov:
Dynamical generation of gauge and Higgs bosons in N=2 supersymmetric non-linear sigma-models
hep-th/9808187 (Nucl. Phys. B 544 (1999) 181-217)

Chandrashekar Devchand and Olaf Lechtenfeld:
String-induced Yang-Mills coupling to self-dual gravity
hep-th/9808053 (Nucl. Phys. B 539 (1999) 309-328)

Sergei V. Ketov:
Analytic tools to brane technology in N=2 gauge theories with matter
hep-th/9806009 (Fortsch. Phys. 47 (1999) 643-703)

1997

Klaus Jünemann and Olaf Lechtenfeld:
Chiral BRST cohomology of the N=2 string at arbitrary ghost and picture number
hep-th/9712182 (Comm. Math. Phys. 203 (1999) 53)

Sinisa Karnas and Sergei V. Ketov:
An action of N=8 self-dual supergravity in ultra-hyperbolic harmonic superspace
hep-th/9712151 (Nucl. Phys. B 526 (1998) 597)

Chandrashekar Devchand and Olaf Lechtenfeld:
Extended self-dual Yang-Mills from the N=2 string
hep-th/9712043 (Nucl. Phys. B 516 (1998) 255)

Sergei Ketov and Christine Unkmeir:
Induced scalar potentials for hypermultiplets
hep-th/9710185 (Phys. Lett. B 422 (1998) 179)

I.L. Buchbinder, S.M. Kuzenko and B.A. Ovrut:
On the D=4, N=2 non-renormalization theorem
hep-th/9710142 (Phys. Lett. B 433 (1998) 335)

Sergei Ketov:
On the exact solutions to quantum N=2 gauge theories: a guide to instantons, superspace and M theory
hep-th/9710085 (unpublished)

Norbert Dragon and Sergei M. Kuzenko:
Self-interacting vector-tensor multiplet
hep-th/9709088 (Phys. Lett. B 420 (1998) 64)

Norbert Dragon, Sergei M. Kuzenko and Ulrich Theis:
The vector-tensor multiplet in harmonic superspace
hep-th/9706169 (Eur. Phys. J. C 4 (1998) 717)

Sergei Ketov:
On the next-to-leading-order correction to the effective action in N=2 gauge theories
hep-th/9706079 (Phys. Rev. D 57 (1998) 1277)

Evgeny Ivanov, Sergei Ketov and Boris Zupnik:
Induced hypermultiplet self-interactions in N=2 gauge theories
hep-th/9706078 (Nucl.Phys. B509 (1998) 53)

Norbert Dragon and Sergei M. Kuzenko:
The Higgs Mechanism in N=2 Superspace
hep-th/9705027 (Nucl. Phys. B 508 (1997) 229)

I.L. Buchbinder, E.I. Buchbinder, S.M. Kuzenko and B.A. Ovrut:
The background field method for N = 2 super Yang-Mills theories in harmonic superspace
hep-th/9704214 (Phys. Lett. B 417 (1998) 61)

Olaf Lechtenfeld and Warren Siegel:
N=2 worldsheet instantons yield cubic self-dual Yang-Mills
hep-th/9704076 (Phys. Lett. B 405 (1997) 49)

Sergei M. Kuzenko:
The off-shell massive hypermultiplets revisited
hep-th/9704002 (Class. Quantum Grav. 14 (1997) L157)

I.L. Buchbinder, E.I. Buchbinder, E.A. Ivanov, S.M. Kuzenko and B.A. Ovrut:
Effective action of N=2 Maxwell multiplet in harmonic superspace
hep-th/9703147 (Phys. Lett. B 412 (1997) 309)

Sergei Ketov:
The effective hyper-Kähler potential in N=2 supersymmetric QCD
hep-th/9701158 (Phys. Lett. B 399 (1997) 83)

1996

Jan Bischoff and Olaf Lechtenfeld:
Path-integral quantization of the (2,2) string
hep-th/9612218 (Int. J. Mod. Phys. A 12 (1997) 4933)

Helge Dennhardt and Olaf Lechtenfeld:
Scalar deformations of Schwarzschild holes and their stability
gr-qc/9612062 (Int. J. Mod. Phys. A 12 (1997) 741)

Sergei Ketov:
Mixed (open/closed) N=(2,2) string theory as an integrable deformation of self-duality
hep-th/9612170 (Phys. Lett. B 395 (1997) 48)

Gernot Akemann, P.H. Damgaard, U. Magnea and S. Nishigaki:
Universality of random matrices in the microscopic limit and the Dirac operator spectrum
hep-th/9609174 (Nucl. Phys. B 487 (1997) 721)

Sergei Ketov:
The OSp(32|1) versus OSp(8|2) supersymmetric M-brane action from self-dual (2,2) strings
hep-th/9609004 (Mod. Phys. Lett. A 11 (1996) 2369)

Jan Bischoff and Olaf Lechtenfeld:
Restoring reality for the self-dual N=2 string
hep-th/9608196 (Phys. Lett. B 390 (1997) 153)

Sergei Ketov, Christine Unkmeir and Sven-Olaf Moch:
(4,4) superfield supergravity
hep-th/9608131 (Class. Quant. Gravity 14 (1997) 285)

Jan Ambjorn and Gernot Akemann:
New universal spectral correlators
cond-mat/9606129 (J. Phys. A 29 (1996) L555)

Gernot Akemann:
Higher genus correlators for the hermitian matrix model with multiple cuts
hep-th/9606004 (Nucl. Phys. B 482 (1996) 403)

Sergei Ketov:
One-loop finiteness of the four-dimensional Donaldson-Nair-Schiff non-linear sigma-model
hep-th/9604141 (Phys. Lett. B 383 (1996) 390)

Sergei Ketov:
2d, N=2 and N=4 supergravity and the Liouville theory in superspace
hep-th/9602038 (Phys. Lett. B 377 (1996) 48)

Murat Günaydin and Sergei Ketov:
Seven-sphere and the exceptional N=7 and N=8 superconformal algebras
hep-th/9601072 (Nucl. Phys. B 467 (1996) 215)

1995

S.M. Kuzenko and Zh.V. Yarevskaya:
Conformal invariance, N-extended supersymmetry and massless spinning particles in anti-de Sitter space
hep-th/9512115 (Mod. Phys. Lett. A 11 (1996) 1653)

S.M. Kuzenko, S.L. Lyakhovich, A.Yu. Segal and A.A. Sharapov:
Massive spinning particle on anti-de Sitter space
hep-th/9509062 (Int. J. Mod. Phys. A 11 (1996) 3307)

S.M. Kuzenko, S.L. Lyakhovich, A.Yu. Segal and A.A. Sharapov:
Spinning particle on anti-de Sitter space
ITP-UH-18/95 (unpublished)

Maximilian Kreuzer and Harald Skarke:
Orbifolds with discrete torsion and mirror symmetry
hep-th/9505120 (Phys. Lett. B 357 (1995) 81)

Jan C. Plefka:
The supereigenvalue model in the double-scaling limit
hep-th/9504089 (Nucl. Phys. B 448 (1995) 355)

S. James Gates, jr. and Sergei V. Ketov:
2D (4,4) hypermultiplets
hep-th/9504077 (unpublished)

Sergei V. Ketov and Olaf Lechtenfeld:
The string measure and spectral flow of critical N=2 strings
hep-th/9503232 (Phys. Lett. B 353 (1995) 463)

Gernot Akemann:
Loop equations for multi-cut matrix models
ITP-UH-11/95 (unpublished)

I.L. Buchbinder, S.M. Kuzenko and A.G. Sibiryakov:
Quantization of higher spin superfields in the anti-de Sitter superspace
hep-th/9502148 (Phys. Lett. B 352 (1995) 29)

Olaf Bechmann and Olaf Lechtenfeld:
Exact black-hole solution with self-interacting scalar field
gr-qc/9502011 (Class. Quant. Grav. 12 (1995) 1473)

S. James Gates, jr. and Sergei V. Ketov:
No N=4 strings on Wolf spaces
hep-th/9501140 (Phys. Rev. D 52 (1995) 2278)

Jan C. Plefka:
Iterative solution of the supereigenvalue model
hep-th/9501120 (Nucl. Phys. B 444 (1995) 333)

1994

Olaf Lechtenfeld and Stuart Samuel:
The solution of the d-dimensional twisted group lattices
hep-th/9412197 (Int. J. Mod. Phys. A11 (1996) 3227)

Maximilian Kreuzer and Harald Skarke:
Landau-Ginzburg orbifolds with discrete torsion
hep-th/9412033 (Mod. Phys. Lett. A10 (1995) 1073)

Olaf Lechtenfeld and Stuart Samuel:
Four-dimensional twisted group lattices
hep-th/9411001 (Nucl. Phys. B449 (1995) 406)

Harald Skarke:
A comment on "On Non-Abelian Duality" by E. Alvarez, L. Alvarez-Gaume and Y. Lozano
hep-th/9409077 (unpublished)

Sergei V. Ketov:
How many N=4 strings exist?
hep-th/9409020 (Class. Quant. Grav. 12 (1995) 925)

Sergei V. Ketov:
The BRST charge for the D(2,1;α) non-linear quasi-superconformal algebra
hep-th/9409017 (Mod. Phys. Lett. A10 (1995) 79)

Sergei V. Ketov:
BRST charge for the orthogonal series of Bershadsky-Knizhnik quasi-superconformal algebras
hep-th/9409007 (unpublished)

Harald Skarke:
Renormalization group flow in a general gauge theory
hep-th/9407086 (Phys. Lett. B336 (1994) 32)

Jan Bischoff, Sergei V. Ketov and Olaf Lechtenfeld:
The GSO projection, BRST cohomology and picture-changing in N=2 string theory
hep-th/9406101 (Nucl. Phys. B438 (1995) 373)

1993

Sergei V. Ketov, Olaf Lechtenfeld and Andrew J. Parkes:
Twisting the N=2 string
hep-th/9312150 ( Phys. Rev. D51 (1995) 2872)

Maximilian Kreuzer and Harald Skarke:
ADE string vacua with discrete torsion
hep-th/9307145 (Phys. Lett. B318 (1993) 305)

Sergei V. Ketov and Sven-Olaf Moch:
N=2 super-Weyl symmetry, super-Liouville theory and super-Riemann surfaces
hep-th/9306140 (Class. Quant. Grav. 11 (1994) 11)

Harald Skarke:
Towards finiteness without supersymmetry
hep-th/9303151 (Int. J. Mod. Phys. A9 (1994) 711)

Sergei V. Ketov:
Space-time supersymmetry of extended fermionic strings in 2+2 dimensions
hep-th/9302091 (Class. Quant. Grav. 10)