160 citations · 430 across the 30 of their papers we have counts for
16 papers · 1 filter
Stochastic quantization with discrete fictitious time
Daisuke Kadoh, Mitsuhiro Kato, Makoto Sakamoto +1
We present a new approach to stochastic quantization à la Parisi-Wu with a discrete fictitious time. The noise average is modified by weights, which results in the equivalence in t…
Quantizing multi-pronged open string junction
Masako Asano, Mitsuhiro Kato
Covariant quantization of multi-pronged open bosonic string junction is studied beyond static analysis. Its excited states are described by a set of ordinary bosons as well as some…
Spiky strings in de Sitter space
Mitsuhiro Kato, Kanji Nishii, Toshifumi Noumi +2
We study semiclassical spiky strings in de Sitter space and the corresponding Regge trajectories, generalizing the analysis in anti-de Sitter space. In particular we demonstrate th…
A lattice formulation of N=2 supersymmetric SYK model
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
We construct N=2 supersymmetric SYK model on one-dimensional (euclidean time) lattice. One nilpotent supersymmetry is exactly realized on the lattice in use of the cyclic Leibniz r…
Supersymmetric extended string field theory in NS^n sector and NS^{n-1}-R sector
Masako Asano, Mitsuhiro Kato
We construct a class of quadratic gauge invariant actions for extended string fields defined on the tensor product of open superstring state space for multiple open string Neveu-Sc…
Extended string field theory for massless higher-spin fields
Masako Asano, Mitsuhiro Kato
We propose a new gauge field theory which is an extension of ordinary string field theory by assembling multiple state spaces of the bosonic string. The theory includes higher spin…
Closed string field theory in a-gauge
Masako Asano, Mitsuhiro Kato
We show that a-gauge, a class of covariant gauges developed for bosonic open string field theory, is consistently applied to the closed string field theory. A covariantly gauge-fix…
General Linear Gauges and Amplitudes in Open String Field Theory
Masako Asano, Mitsuhiro Kato
A general class of gauges for open string field theory, for which the gauge fixing condition is given by linear equations with respect to string field, is investigated in detail. T…
Level Truncated Tachyon Potential in Various Gauges
Masako Asano, Mitsuhiro Kato
New gauge fixing condition with single gauge parameter proposed by the authors is applied to the level truncated analysis of tachyon condensation in cubic open string field theory.…
New Covariant Gauges in String Field Theory
Masako Asano, Mitsuhiro Kato
A single-parameter family of covariant gauge fixing conditions in bosonic string field theory is proposed. It is a natural string field counterpart of the covariant gauge in the co…
Physical state representations and gauge fixing in string theory
Masako Asano, Mitsuhiro Kato, Makoto Natsuume
We re-examine physical state representations in the covariant quantization of bosonic string. We especially consider one parameter family of gauge fixing conditions for the residua…
World Volume Noncommutativity versus Target Space Noncommutativity
Mitsuhiro Kato, Tsunehide Kuroki
It is known that the noncommutativity of D-brane coordinate is responsible for describing the higher-dimensional D-branes in terms of more fundamental ones such as D-particles or D…
Topological Matrix Model
Shinji Hirano, Mitsuhiro Kato
Starting from the primal principle based on the noncommutative nature of (9+1)-dimensional spacetime, we construct a topologically twisted version of the supersymmetric reduced mod…
D-Branes on Group Manifolds
Mitsuhiro Kato, Tomoharu Okada
Possible Dirichlet boundary states for WZW models with untwisted affine super Kac-Moody symmetry are classified for all compact simple Lie groups. They are obtained by inner- and o…
Physical Spectra in String Theories --- BRST Operators and Similarity Transformations
Mitsuhiro Kato
Several examples of similarity transformations connecting two string theories with different backgrounds are reviewed. We also discuss general structure behind the similarity trans…
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…