Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Kostov I"'
Publikováno v:
Nucl.Phys.B795:243-276,2008
We study the interactions of Maldacena's long folded strings in two-dimensional string theory. We find the amplitude for a state containing two long folded strings to come and go back to infinity. We calculate this amplitude both in the worldsheet th
Externí odkaz:
http://arxiv.org/abs/0709.3912
Autor:
Kostov, I. K., Petkova, V. B.
Publikováno v:
Nucl.Phys.B769:175-216,2007
We explore the formulation of non-rational 2D quantum gravity in terms of a chiral CFT on a Riemann surface associated with the target space. The CFT in question is constructed as the collective theory for a matrix chain, which is dual to a statistic
Externí odkaz:
http://arxiv.org/abs/hep-th/0609020
Autor:
Kostov, I. K., Petkova, V. B.
Publikováno v:
Nucl.Phys.B770:273-331,2007
We address the problem of computing the tachyon correlation functions in Liouville gravity with generic (non-rational) matter central charge c<1. We consider two variants of the theory. The first is the conventional one in which the effective matter
Externí odkaz:
http://arxiv.org/abs/hep-th/0512346
Autor:
Kostov, I. K., Petkova, V. B.
Publikováno v:
Theor.Math.Phys. 146 (2006) 108-118; Teor.Mat.Fiz. 146 (2006) 132-145
We compute bulk 3- and 4-point tachyon correlators in the 2d Liouville gravity with non-rational matter central charge c<1, following and comparing two approaches. The continuous CFT approach exploits the action on the tachyons of the ground ring gen
Externí odkaz:
http://arxiv.org/abs/hep-th/0505078
Autor:
Kazakov, V., Kostov, I.
We derive the non-perturbative corrections to the free energy of the two-matrix model in terms of its algebraic curve. The eigenvalue instantons are associated with the vanishing cycles of the curve. For the (p,q) critical points our results agree wi
Externí odkaz:
http://arxiv.org/abs/hep-th/0403152
Publikováno v:
Random matrices and their applications, MSRI publications,vol.40, 285,2001, Cambridge University Press
We review the concept of $\tau$-function for simple analytic curves. The $\tau$-function gives a formal solution to the 2D inverse potential problem and appears as the $\tau$-function of the integrable hierarchy which describes conformal maps of simp
Externí odkaz:
http://arxiv.org/abs/hep-th/0005259
Autor:
Kostov, I. K.
The microscopic theories of quantum gravity related to integrable lattice models can be constructed as special deformations of pure gravity. Each such deformation is defined by a second order differential operator acting on the coupling constants. As
Externí odkaz:
http://arxiv.org/abs/hep-th/9602117
Autor:
Kostov, I. K.
The U(N) gauge theory on a D-dimensional lattice is reformulated as a theory of lattice strings (a statistical model of random surfaces). The Boltzmann weights of the surfaces can have both signs and are tuned so that the longitudinal modes of the st
Externí odkaz:
http://arxiv.org/abs/hep-th/9306110
Publikováno v:
Nucl.Phys. B409 (1993) 311-338
The correspondence claimed by M. Douglas, between the multicritical regimes of the two-matrix model and 2D gravity coupled to (p,q) rational matter field, is worked out explicitly. We found the minimal (p,q) multicritical potentials U(X) and V(Y) whi
Externí odkaz:
http://arxiv.org/abs/hep-th/9303093
Autor:
Kostov, I.
Publikováno v:
Phys.Lett.B297:74-81,1992
The models of triangulated random surfaces embedded in (extended) Dynkin diagrams are formulated as a gauge-invariant matrix model of Weingarten type. The double scaling limit of this model is described by a collective field theory with nonpolynomial
Externí odkaz:
http://arxiv.org/abs/hep-th/9208053