65 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Keio UniversityJP7 papers
- University of WarwickGB4 papers
- Tohoku UniversityJP3 papers
- Tokyo University of ScienceJP3 papers
- University of TsukubaJP3 papers
- Ferris UniversityJP2 papers
- Hokkaido UniversityJP2 papers
- Meiji Gakuin UniversityJP2 papers
- Muroran Institute of TechnologyJP2 papers
- Nagoya UniversityJP2 papers
- National Institute of TechnologyJP2 papers
- Tokyo Woman's Christian UniversityJP2 papers
36 papers
Complex saddles of three-dimensional de Sitter gravity via holography
Heng-Yu Chen, Yasuaki Hikida, Yusuke Taki +1
We determine complex saddles of three-dimensional gravity with a positive cosmological constant by applying the recently proposed holography. It is sometimes useful to consider a c…
The lifespan estimates of classical solutions of one dimensional semilinear wave equations with characteristic weights
Shunsuke Kitamura, Hiroyuki Takamura, Kyouhei Wakasa
In this paper, we study the lifespan estimates of classical solutions for semilinear wave equations with characteristic weights and compactly supported data in one space dimension.…
Confining potential under the gauge field condensation in the SU(2) Yang-Mills theory
Hirohumi Sawayanagi
potential is studied in the SU(2) gauge theory. Based on the nonlinear gauge of the Curci-Ferrari type, the possibility of a gluon condensation $\langle A_μ^+A_μ^-\rangl…
Critical exponent for the wave equation with a time-dependent scale invariant damping and a cubic convolution
Masahiro Ikeda, Tomoyuki Tanaka, Kyouhei Wakasa
In the present paper, we study the Cauchy problem for the wave equation with a time-dependent scale invariant damping and a cubic convolution $(|x|^{-γ}…
Small data blow-up for the wave equation with a time-dependent scale invariant damping and a cubic convolution for slowly decaying initial data
Masahiro Ikeda, Tomoyuki Tanaka, Kyouhei Wakasa
In the present paper, we study the Cauchy problem for the wave equation with a time-dependent scale invariant damping, i.e. and a cubic convolution $(|x|…
The lifespan of solutions of semilinear wave equations with the scale-invariant damping in two space dimensions
Takuto Imai, Masakazu Kato, Hiroyuki Takamura +1
In this paper, we study the initial value problem for semilinear wave equations with the time-dependent and scale-invariant damping in two dimensions. Similarly to the one dimensio…
Massive dual gauge field and confinement in Minkowski space : Electric charge
Hirohumi Sawayanagi
SU(2) gauge theory in the nonlinear gauge of the Curci-Ferrari type is studied in low-energy region. We give a classical solution that connects color electric charges. Its dual sol…
Finite time blowup of solutions to semilinear wave equation in an exterior domain
Motohiro Sobajima, Kyouhei Wakasa
We consider the initial-boundary value problem of semilinear wave equation with nonlinearity in exterior domain in . Especially, the lifespan of b…
The lifespan of solutions of semilinear wave equations with the scale-invariant damping in one space dimension
Masakazu Kato, Hiroyuki Takamura, Kyouhei Wakasa
The critical constant of time-decaying damping in the scale-invariant case is recently conjectured. It also has been expected that the lifespan estimate is the same as for the asso…
Massive dual gauge field and confinement in Minkowski space : Magnetic charge
Hirohumi Sawayanagi
Gauge field configuration for a magnetic monopole and its dual configuration are studied in SU(2) gauge theory. We present a relation between the monopole field and its dual field.…
Test function method for blow-up phenomena of semilinear wave equations and their weakly coupled systems
Masahiro Ikeda, Motohiro Sobajima, Kyouhei Wakasa
In this paper we consider the wave equations with power type nonlinearities including time-derivatives of unknown functions and their weakly coupled systems. We propose a framework…
Multiloop Amplitudes of Light-cone Gauge Superstring Field Theory: Odd Spin Structure Contributions
Nobuyuki Ishibashi, Koichi Murakami
We study the odd spin structure contributions to the multiloop amplitudes of light-cone gauge superstring field theory. We show that they coincide with the amplitudes in the confor…
Condensate and massive magnetic potential in Euclidean gauge theories
Hirohumi Sawayanagi
Euclidean gauge theory is studied in a nonlinear gauge. In this theory, ghost condensation happens and gauge fields acquire tachyonic masses. It is shown that these tachyon…
The Gribov Horizon and Ghost Interactions in Euclidean Gauge Theories
Hirohumi Sawayanagi
The effect of the Gribov horizon in Euclidean gauge theory is studied. Gauge fields on the Gribov horizon yield zero modes of ghosts and anti-ghosts. We show these zero mod…
Multiloop Amplitudes of Light-cone Gauge NSR String Field Theory in Noncritical Dimensions
Nobuyuki Ishibashi, Koichi Murakami
Feynman amplitudes of light-cone gauge superstring field theory are ill-defined because of various divergences. In a previous paper, one of the authors showed that taking the world…
Vortex driven phase transition in Topologically Massive QED
Yuichi Hoshino
There is chiral like symmetry for 4-component massless fermion in (2+1)-dimensional gauge theory.Since QED with Chern-Simons term contains vortex solution for vector potentia…
Worldsheet theory of light-cone gauge noncritical strings on higher genus Riemann surfaces
Nobuyuki Ishibashi, Koichi Murakami
It is possible to formulate light-cone gauge string field theory in noncritical dimensions. Such a theory corresponds to conformal gauge worldsheet theory with nonstandard longitud…
A note on lower bounds for boxicity of graphs
Akira Kamibeppu
The boxicity of a graph is the minimum non-negative integer such that can be isomorphic to the intersection graph of a family of boxes in Euclidean -space, where a b…
Gauge covariant solution for the Schwinger-Dyson equation in three-dimensional QED with Chern-Simons term
Yuichi Hoshino, Tomohiro Inagaki, Yuichi Mizutani
An Abelian gauge theory with Chern-Simons term is investigated for a four-component Dirac fermion in 1+2 dimensions. The Ball-Chiu (BC) vertex function is employed to modify the ra…
Gauge Theories in Noncommutative Homogeneous Kähler Manifolds
Yoshiaki Maeda, Akifumi Sako, Toshiya Suzuki +1
We construct a gauge theory on a noncommutative homogeneous Kähler manifold, where we employ the deformation quantization with separation of variables for Kähler manifolds formulat…
Soft-photon exponentiation beyond the quenched approximation in QED
Yuichi Hoshino
We discuss the infrared and ultraviolet behavior of the fermion propagator in (2+1)-dimensional QED based on spectral representation.If we choose soft-photon exponentiation to incl…
Off-shell Invariant D=N=2 Twisted Super Yang-Mills Theory with a Gauged Central Charge without Constraints
Keisuke Asaka, Junji Kato, Noboru Kawamoto +1
We formulate N=2 twisted super Yang-Mills theory with a gauged central charge by superconnection formalism in two dimensions. We obtain off-shell invariant supermultiplets and acti…
Explicit Formulae for Noncommutative Deformations of CP^N and CH^N
Akifumi Sako, Toshiya Suzuki, Hiroshi Umetsu
We give explicit expressions of a deformation quantization with separation of variables for CP^N and CH^N. This quantization method is one of the ways to perform a deformation quan…
Moduli space volume of vortex and localization
Akiko Miyake, Kazutoshi Ohta, Norisuke Sakai
Volume of moduli space of BPS vortices on a compact genus h Riemann surface Sigma_h is evaluated by means of topological field theory and localization technique. Vortex in Abelian…