3 citations · 3 across the 1 of their papers we have counts for
8 papers
Non-anticommutative N=(1,1) Euclidean Superspace
E. Ivanov, O. Lechtenfeld, B. Zupnik
We study deformations of four-dimensional N=(1,1)Euclidean superspace induced by non-anticommuting fermionic coordinates. We essentially use the harmonic superspace approach and co…
Light-Cone Gauge for N=2 Strings
Olaf Lechtenfeld, Warren Siegel
Covariant quantization of self-dual strings in 2+2 flat dimensions reduces them to their zero modes, a consequence of extended world-sheet supersymmetry. We demonstrate how to arri…
Mathematics and Physics of N=2 Strings
Olaf Lechtenfeld
Open and closed strings with two worldsheet supersymmetries in 2+2 dimensional spacetime are reviewed in the NSR formulation. I briefly discuss their quantization, mutual and self-…
Manifestly invariant actions for harmonic self-dual gauge theory
Olaf Lechtenfeld, Boris Zupnik
We discuss alternative descriptions of four-dimensional self-dual Yang-Mills fields in harmonic space with additional commuting spinor coordinates. In particular, the linear analyt…
The Self-Dual Critical N=2 String
Olaf Lechtenfeld
I review the covariant quantization of the closed fermionic string with (2,2) extended world-sheet supersymmetry on R^{2,2}. Results on n-point scattering amplitudes are presented,…
On the BRST Cohomology of N=2 Strings
Olaf Lechtenfeld
We analyze the BRST cohomology of the critical N=2 NSR string using chiral bosonization. Picture-changing and spectral flow is made explicit in a holomorphic field basis. The integ…