121 citations · 3.6k across the 201 of their papers we have counts for
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N=2 supersymmetric S^2 -> CP^3 -> S^4 fibration viewed as superparticle mechanics
Nikolay Kozyrev, Sergey Krivonos, Olaf Lechtenfeld
We discuss a Hamiltonian reduction procedure that relates the mechanics of an N=2 particle on CP^3 with the motion of such a superparticle on S^4 in the presence of an instanton ba…
Instantons on the six-sphere and twistors
Olaf Lechtenfeld, Alexander D. Popov
We consider the six-sphere S^6=G_2/SU(3) and its twistor space Z=G_2/U(2) associated with the SU(3)-structure on S^6. It is shown that a Hermitian Yang-Mills connection (instanton)…
Noncommutative deformation of the Ward metric
Magnus Goffeng, Olaf Lechtenfeld
The moduli-space metric in the static non-Abelian charge-two sector of the Moyal-deformed CP^1 sigma model in 1+2 dimensions is analyzed. After recalling the commutative results of…
Nahm equations in supersymmetric mechanics
Sergey Fedoruk, Evgeny Ivanov, Olaf Lechtenfeld
We elaborate on a novel model of N=4 supersymmetric mechanics with extra spin variables. A dynamical linear (1,4,3) multiplet is coupled to a "semi-dynamical" linear (3,4,1) multip…
Heterotic string plus five-brane systems with asymptotic AdS3
Karl-Philip Gemmer, Alexander S. Haupt, Olaf Lechtenfeld +2
We present NS1+NS5-brane solutions of heterotic supergravity on curved geometries. They interpolate between a near horizon AdS3 x X^k x T^{7-k} region and R^{1,1} x c(X^k) x T^{7-k…
Nearly Kähler heterotic compactifications with fermion condensates
Athanasios Chatzistavrakidis, Olaf Lechtenfeld, Alexander D. Popov
We revisit AdS_4 heterotic compactifications on nearly Kähler manifolds in the presence of H-flux and certain fermion condensates. Unlike previous studies, we do not assume the van…