36 citations · 102 across the 10 of their papers we have counts for
10 papers
Twisted boundary states and representation of generalized fusion algebra
Hiroshi Ishikawa, Taro Tani
The mutual consistency of boundary conditions twisted by an automorphism group G of the chiral algebra is studied for general modular invariants of rational conformal field theorie…
Twisted boundary states in Kazama-Suzuki models
Hiroshi Ishikawa, Taro Tani
We construct Cardy states in the Kazama-Suzuki model G/H x U(1), which satisfy the boundary condition twisted by the automorphisms of the coset theory. We classify all the automorp…
Twisted boundary states in c=1 coset conformal field theories
Hiroshi Ishikawa, Atsushi Yamaguchi
We study the mutual consistency of twisted boundary conditions in the coset conformal field theory G/H. We calculate the overlap of the twisted boundary states of G/H with the untw…
Novel construction of boundary states in coset conformal field theories
Hiroshi Ishikawa, Taro Tani
We develop a systematic method to solve the Cardy condition for the coset conformal field theory G/H. The problem is equivalent to finding a non-negative integer valued matrix repr…
Boundary states in coset conformal field theories
Hiroshi Ishikawa
We construct various boundary states in the coset conformal field theory G/H. The G/H theory admits the twisted boundary condition if the G theory has an outer automorphism of the…
Free Field Realization of D-brane in Group Manifold
Hiroshi Ishikawa, Satoshi Watamura
We construct the boundary state for the D-brane in the SU(2) group manifold directly in terms of the group variables. We propose a matching condition for the left- and the right-mo…
On the equivalence of fermionic string to bosonic string in two dimensions
Hiroshi Ishikawa
Two-dimensional fermionic string theory is shown to have a structure of topological model, which is isomorphic to a tensor product of two topological ghost systems independent of e…
Topological Structure in Fermionic String Theory
Shinji Hirano, Hiroshi Ishikawa
$\chat=1$ fermionic string theory, which is considered as a fermionic string theory in two dimension, is shown to decompose into two mutually independent parts, one of which can be…
Non-linear Structures in Non-critical NSR String
Ken-ji Hamada, Hiroshi Ishikawa
We investigate the Ward identities of the $\W_{\infty}$ symmetry in the super-Liouville theory coupled to the super-conformal matter of central charge …
Equivalence of BRST cohomologies for 2-d black hole and c=1 Liouville theory
Hiroshi Ishikawa, Mitsuhiro Kato
We study the relation between the black hole and the Liouville theory. A deformation, which interpolates the BRST operators of both models, is explicitly const…