Zobrazeno 1 - 10
of 328
pro vyhledávání: '"Nekrasov N"'
The main goal of the first part of the paper is to show that the Fermi curve of a two-dimensional periodic Schr\"odinger operator with nonnegative potential whose points parameterize the Bloch solutions of the Shr\"odinger equation at the zero energy
Externí odkaz:
http://arxiv.org/abs/1903.01778
The present paper is the second part of our project in which we describe quantum field theories with instantons in a novel way by using the "infinite radius limit" (rather than the limit of free field theory) as the starting point. The theory dramati
Externí odkaz:
http://arxiv.org/abs/0803.3302
Publikováno v:
Nucl.Phys.Proc.Suppl.171:215-230,2007
This is a brief summary of our studies of quantum field theories in a special limit in which the instantons are present, the anti-instantons are absent, and the perturbative corrections are reduced to one-loop. We analyze the corresponding models as
Externí odkaz:
http://arxiv.org/abs/hep-th/0702137
Many quantum field theories in one, two and four dimensions possess remarkable limits in which the instantons are present, the anti-instantons are absent, and the perturbative corrections are reduced to one-loop. We analyze the corresponding models a
Externí odkaz:
http://arxiv.org/abs/hep-th/0610149
We discuss the GW/DT correspondence for 3-folds in both the absolute and relative cases. Descendents in Gromov-Witten theory are conjectured to be equivalent to Chern characters of the universal sheaf in Donaldson-Thomas theory. Relative constraints
Externí odkaz:
http://arxiv.org/abs/math/0406092
Publikováno v:
JHEP 0410:009,2004
In this paper we show how S-duality of type IIB superstrings leads to an S-duality relating A and B model topological strings on the same Calabi-Yau as had been conjectured recently: D-instantons of the B-model correspond to A-model perturbative ampl
Externí odkaz:
http://arxiv.org/abs/hep-th/0403167
We conjecture an equivalence between the Gromov-Witten theory of 3-folds and the holomorphic Chern-Simons theory of Donaldson-Thomas. For Calabi-Yau 3-folds, the equivalence is defined by the change of variables, exp(iu)=-q, where u is the genus para
Externí odkaz:
http://arxiv.org/abs/math/0312059
Publikováno v:
JHEP 0804:011,2008
We find an interpretation of the recent connection found between topological strings on Calabi-Yau threefolds and crystal melting: Summing over statistical mechanical configuration of melting crystal is equivalent to a quantum gravitational path inte
Externí odkaz:
http://arxiv.org/abs/hep-th/0312022
Publikováno v:
JHEP 0202 (2002) 021
We study realization of the target space diffeomorphisms in the type $C$ topological string. We found that the charges, which generate transformations of the boundary observables, form an algebra, which differs from that of bulk charges by the contri
Externí odkaz:
http://arxiv.org/abs/hep-th/0106042
Autor:
Braden, H. W., Nekrasov, N. A.
We review the deformed instanton equations making connection with Hilbert schemes and integrable systems. A single U(1) instanton is shown to be \asd\ with respect to the Burns metric.
Comment: 21 pages, 2 figures
Comment: 21 pages, 2 figures
Externí odkaz:
http://arxiv.org/abs/hep-th/0103204