Zobrazeno 1 - 10
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pro vyhledávání: '"Kostov, Ivan K."'
Autor:
Kostov, Ivan K.
We study the massless flow from the critical point (dilute loops) to the low-temperature phase (dense loops) of the O(n) loop gas model when the model is coupled to 2D gravity. The flow is generated by the gravitationally dressed thermal operator \Ph
Externí odkaz:
http://arxiv.org/abs/hep-th/0602075
Publikováno v:
JHEP0502:023,2005
We study the non-perturbative corrections (NPC) to the partition function of a compactified 2D string theory in a time-dependent background generated by a tachyon source. The sine-Liouville deformation of the theory is a particular case of such a bac
Externí odkaz:
http://arxiv.org/abs/hep-th/0412223
Autor:
Kostov, Ivan K.
We construct the boundary ground ring in c < 1 open string theories with non-zero boundary cosmological constant (FZZT brane), using the Coulomb gas representation. The ring relations yield an over-determined set of functional recurrence equations fo
Externí odkaz:
http://arxiv.org/abs/hep-th/0402098
Autor:
Kostov, Ivan K.
Publikováno v:
Nucl.Phys. B689 (2004) 3-36
The 2D quantum gravity on a disc, or the non-critical theory of open strings, is known to exhibit an integrable structure, the boundary ground ring, which determines completely the boundary correlation functions. Inspired by the recent progress in bo
Externí odkaz:
http://arxiv.org/abs/hep-th/0312301
Publikováno v:
Nucl.Phys. B683 (2004) 309-362
We study the boundary correlation functions in Liouville theory and in solvable statistical models of 2D quantum gravity. In Liouville theory we derive functional identities for all fundamental boundary structure constants, similar to the one obtaine
Externí odkaz:
http://arxiv.org/abs/hep-th/0307189
Publikováno v:
Nucl.Phys. B667 (2003) 90-110
We show that the $c=1$ bosonic string theory at finite temperature has two matrix-model realizations related by a kind of duality transformation. The first realization is the standard one given by the compactified matrix quantum mechanics in the inve
Externí odkaz:
http://arxiv.org/abs/hep-th/0302106
Autor:
Kostov, Ivan K.
Publikováno v:
Nucl.Phys. B658 (2003) 397-416
We calculate a class of two-point boundary correlators in 2D quantum gravity using its microscopic realization as loop gas on a random surface. We find a perfect agreement with the two-point boundary correlation function in Liouville theory, obtained
Externí odkaz:
http://arxiv.org/abs/hep-th/0212194
Autor:
Kostov, Ivan K.
Publikováno v:
J.Phys.A36:3153-3172,2003; AnnalesHenriPoincare4:S825-S849,2003
In these notes we review the method to construct integrable deformations of the compactified c=1 bosonic string theory by primary fields (momentum or winding modes), developed recently in collaboration with S. Alexandrov and V. Kazakov. The method is
Externí odkaz:
http://arxiv.org/abs/hep-th/0208034
Publikováno v:
Nucl.Phys.B640:119-144,2002
We study possible backgrounds of 2D string theory using its equivalence with a system of fermions in upside-down harmonic potential. Each background corresponds to a certain profile of the Fermi sea, which can be considered as a deformation of the hy
Externí odkaz:
http://arxiv.org/abs/hep-th/0205079
Autor:
Kostov, Ivan K.
Publikováno v:
Nucl.Phys. B624 (2002) 146-162
We derive a constraint (string equation) which together with the Toda Lattice hierarchy determines completely the integrable structure of the compactified 2D string theory. The form of the constraint depends on a continuous parameter, the compactific
Externí odkaz:
http://arxiv.org/abs/hep-th/0107247