Mitsuhiro Kato

J-GLOBAL         Last updated: Sep 26, 2018 at 16:58
Mitsuhiro Kato
The University of Tokyo

Research Areas


Published Papers

Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
   Sep 2018   [Refereed]
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 rule (CLR).
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PTEP   2017(4) 043B09   Apr 2017   [Refereed]
N=4 supersymmetric quantum mechanical model is formulated on the lattice. Two
supercharges, among four, are exactly conserved with the help of the cyclic
Leibniz rule without spoiling the locality. In use of the cohomological
argument, any possibl...
Masako Asano, Mitsuhiro Kato
Nucl.Phys.   B910 178-198   2016   [Refereed]
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-Schwarz (NS) sectors with or without one Ramond (R)
sector. The basic...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PoS LATTICE2014   274   2014   [Refereed]
We propose a lattice model of supersymmetric complex quantum mechanics which
realizes the non-renormalization theorem on a lattice. In our lattice model,
the Leibniz rule in the continuum, which cannot hold on a lattice due to a
no-go theorem, is ...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PoS LATTICE2013   356   2014   [Refereed]
For the purpose of constructing supersymmetric(SUSY) theories on lattice, we
propose a new type relation on lattice -cyclic Leibniz rule(CLR)- which is
slightly different from an ordinary Leibniz rule. Actually, we find that CLR
can enlarge the nu...
Hybrid Monte Carlo on Lefschetz thimbles - A study of the residual sign problem
H. Fujii, D. Honda, M. Kato, Y. Kikukawa, S. Komatsu, T. Sano
JHEP   1310 147   Oct 2013   [Refereed]
Masako Asano, Mitsuhiro Kato
Nucl.Phys.   B877 1107-1128   2013   [Refereed]
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 fields in its massless spectrum together with the
infinite tower o...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
JHEP   1305 089   May 2013   [Refereed]
It is old folklore that the violation of Leibniz rule on a lattice is an
obstruction for constructing a lattice supersymmetric model. While it is still
true for full supersymmetry, we show that a slightly modified form of the
Leibniz rule, which w...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PoS LATTICE2012   231   Dec 2012   [Refereed]
In a finite volume system, we prove a no-go theorem on a Leibniz rule with a
care of locality argument on latttice. The new possibility on the Leibniz rule
solutions on lattice is discussed. Although the new solution admits a local
difference oper...
Masako Asano, Mitsuhiro Kato
JHEP   1209 121   Sep 2012   [Refereed]
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-fixed action of massless fields can be systematically
derived from a-g...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PoS LATTICE2008:233,2008      Oct 2008   [Refereed]
An obstacle to realize supersymmetry on a lattice is the breakdown of Leibniz
rule. We give a proof of a no-go theorem that it is impossible to construct a
lattice field theory in an infinite lattice volume with any nontrivial field
products and d...
Masako Asano, Mitsuhiro Kato
Nucl.Phys.   B807 348-372   2009   [Refereed]
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. This class of gauges includes almost all known ones
like Siegel gaug...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
JHEP   0805 057   May 2008   [Refereed]
We study a product rule and a difference operator equipped with Leibniz rule
in a general framework of lattice field theory. It is shown that the difference
operator can be determined by the product rule and some initial data through
the Leibniz r...
Masako Asano, Mitsuhiro Kato
Prog.Theor.Phys.117:569-587,2007   117(3) 569-587   Mar 2007   [Refereed]
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 conventional gauge theory, which includes the Landau
gauge as well as...
Masako Asano, Mitsuhiro Kato
JHEP   0701 028   Jan 2007   [Refereed]
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. It is found that the only one real non-trivial
extremum persists t...
Mitsuhiro Kato, Makoto Sakamoto, Hiroto So
PoS LAT2005 (2005) 274      Sep 2005   [Refereed]
We propose a new formulation of lattice theory. It is given by a matrix form
and suitable for satisfying Leibniz rule on lattice. The theory may be
interpreted as a multi-flavor system. By realizing the difference operator as a
commutator, we may ...
Masako Asano, Mitsuhiro Kato, Makoto Natsuume
JHEP0511:033,2005      Sep 2005   [Refereed]
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 residual gauge symmetry due to null states (or BRST exact
states), and obt...
Katsumi Itoh, Mitsuhiro Kato, Michika Murata, Hideyuki Sawanaka, Hiroto So
Prog.Theor.Phys. 114 (2005) 631-641   114(3) 631-641   Sep 2005   [Refereed]
We present a new formulation of the staggered fermion on the D-dimensional
lattice based on the SO(2D) Clifford algebra, which is naturally present in the
action. The action of the massless staggered fermion is invariant under the
discrete rotatio...
Novel approach to superYang-Mills theory on lattice: Exact fermionic symmetry and 'Ichimatsu' pattern
Katsumi Itoh, Mitsuhiro Kato, Hideyuki Sawanaka, Hiroto So, Naoya Ukita
0302 033   Feb 2003   [Refereed]
Katsumi Itoh, Mitsuhiro Kato, Hideyuki Sawanaka, Hiroto So, Naoya Ukita
Prog.Theor.Phys. 108 (2002) 363-374   108(2) 363-374   Aug 2002   [Refereed]
We present an entirely new approach towards a realization of the
supersymmetric Yang-Mills theory on the lattice. The action consists of the
staggered fermion and the plaquette variables distributed in the Euclidean
space with a particular pattern...
Mitsuhiro Kato, Tsunehide Kuroki
JHEP   9903 012   Mar 1999   [Refereed]
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-instantons, while considering a noncommutative
torus as a target s...
Shinji Hirano, Mitsuhiro Kato
Prog.Theor.Phys.   98 1371-1384   1997   [Refereed]
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 model with a certain modification. Our formulation
automatically provi...
Mitsuhiro Kato, Tomoharu Okada
Nucl.Phys. B   B499 583-595   1997   [Refereed]
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 outer-automorphism of the group. D-brane world-volume
turns out to b...
Mitsuhiro Kato
   Dec 1995   [Refereed]
Several examples of similarity transformations connecting two string theories
with different backgrounds are reviewed. We also discuss general structure
behind the similarity transformations from the point of view of the topological
conformal alge...
Hiroshi Ishikawa, Mitsuhiro Kato
Int.J.Mod.Phys.   A9 5769-5790   1994   [Refereed]
Hiroshi Ishikawa, Mitsuhiro Kato
Mod.Phys.Lett.   A9 725-728   1994   [Refereed]
Hiroshi Ishikawa, Mitsuhiro Kato
Phys.Lett. B302 (1993) 209-214   B302 209-214   1993   [Refereed]
We study the relation between the Tex black hole and the Tex
Liouville theory. A deformation, which interpolates the BRST operators of both
models, is explicitly constructed. This interpolation is isomorphic, and the
physical spectrum...
P. Di Vecchia, M. Kato, N. Ohta
Int.J.Mod.Phys.   A7 1391-1414   1992   [Refereed]
Missing link between Virasoro and sl(2) Kac-Moody algebras
Mitsuhiro Kato, Yasuhiko Yamada
Prog.Theor.Phys.Suppl.   110 291-302   1992   [Refereed]
Double scaling limit in O(N) vector models
P. Di Vecchia, M. Kato, N. Ohta
Nucl. Phys.   B357 495-520   1991   [Refereed]
Mitsuhiro Kato
Phys. Lett.   B245 43-47   1990   [Refereed]
Katsumi Itoh, Mitsuhiro Kato, Hiroshi Kunitomo, Makoto Sakamoto
Nucl.Phys.   B306 362   1988   [Refereed]
Can SST-II Contain The Standard Model?
Mitsuhiro Kato, Takao Koikawa, Machiko Tatewaki Hatsuda
Mod.Phys.Lett.   A3 1603   1988   [Refereed]
Mitsuhiro Kato, Satoshi Matsuda
Prog.Theor.Phys.   78 158   1987   [Refereed]
H. Arisue, T. Fujiwara, M. Kato, K. Ogawa
Phys. Rev.   D35 2309   1987   [Refereed]
Mitsuhiro Kato, Satoshi Matsuda
Phys.Lett.   B184 184-190   1987   [Refereed]
Mitsuhiro Kato, Satoshi Matsuda
Phys. Lett.   B172 216-222   1986   [Refereed]
Mitsuhiro Kato
Prog.Theor.Phys.   73 426   1985   [Refereed]
Variational Study of Vacuum Wave Function for Lattice Gauge Theory in (2+1)-dimension
Hiroaki Arisue, Mitsuhiro Kato, Toshiaki Fujiwara
Prog.Theor.Phys.   70 229   1983   [Refereed]
Covariant Quantization of String Based on BRS Invariance
Mitsuhiro Kato, Kaku Ogawa
Nucl. Phys.   B212 443-460   1983   [Refereed]


伊藤 克美, 加藤 光裕, 澤中 英之, 宗 博人
日本物理學會誌   58(11) 825-828   Nov 2003
A lattice supersymmetric gauge theory would be of vital importance to investigate the physics beyond the standard model. After briefly describing various difficulties encountered in earlier works, we explain our model, which carries some lattice s...
加藤 光裕
Soryushiron Kenkyu   102(3) C6-C18   Dec 2000

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