36 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Yamaguchi UniversityJP29 papers
- National Institute of TechnologyJP4 papers
- RIKEN Nishina CenterJP4 papers
- Kyushu UniversityJP3 papers
- National Institute of Technology, Kagoshima CollegeJP3 papers
- The University of OsakaJP3 papers
- Ibaraki UniversityJP2 papers
- Institute of Space and Astronautical ScienceJP2 papers
- Japan Aerospace Exploration AgencyJP2 papers
- National Astronomical Observatory of JapanJP2 papers
- National Institute of Information and Communications TechnologyJP2 papers
- Osaka Metropolitan UniversityJP2 papers
12 papers · 1 filter
Dynamical mass generation of spin-2 fields in de Sitter space for an symmetric model at large
Nahomi Kan, Kiyoshi Shiraishi
We consider the strong-coupling phase in a model of spin-2 field theory in de Sitter spacetime and the effective mass of spin-2 fields therein. In the strong-coupling phase,…
Discrete time heat kernel and UV modified propagators with Dimensional Deconstruction
Nahomi Kan, Kiyoshi Shiraishi
We revisit the dimensionally deconstructed scalar quantum electrodynamics and consider the (Euclidean) propagator of the scalar field in the model. Although we have previously inve…
Geometrical effective actions for a partially massless spin-2 field
Nahomi Kan, Takuma Aoyama, Kiyoshi Shiraishi
We consider nonlinear effective actions for a spin-2 field, whose `decoupling' limit gives Fierz-Pauli action in D dimensional maximally symmetric spacetime. We find, especially, t…
Hosotani mechanism in the "color"-singlet plasma
Nahomi Kan, Koichiro Kobayashi, Kiyoshi Shiraishi
By projecting the partition function on the "color"-singlet state, we investigate the Hosotani mechanism in the fermion-gauge boson plasma. The present toy-model analysis of the on…
Quantum fluctuation of stress tensor in a higher-derivative scalar field theory around a cosmic string
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi
We calculate the vacuum fluctuation of the stress tensor of a higher-derivative theory around a thin cosmic string. To this end, we adopt the method to obtain the stress tensor fro…
Discrete heat kernel, UV modified Green's function, and higher derivative theories
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We perform the UV deformation of the Green's function in free scalar field theory using a discrete heat kernel method. It is found that the simplest UV deformation based on the dis…
Vacuum expectation values in non-trivial background space from three types of UV improved Green's functions
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We evaluate the quantum expectation values in non-simply connected spaces by using UV improved Green's functions proposed by Padmanabhan, Abel, and Siegel. It is found that the res…
Integrable higher-dimensional cosmology with separable variables in an Einstein-dilaton-antisymmetric field theory
Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi +1
We consider a -dimensional cosmological model with a dilaton field and two -form field strengths which have nonvanishing fluxes in extra dimensions. Exact solutions for…
Magnetic monopoles in multi-vector boson theories
Koichiro Kobayashi, Nahomi Kan, Kiyoshi Shiraishi
A classical solution for a magnetic monopole is found in a specific multi-vector boson theory. We consider the model whose gauge group is broken by sigma-model fiel…
A Newtonian Analysis of Multi-scalar Boson Stars with Large Self-couplings
Nahomi Kan, Kiyoshi Shiraishi
We study solutions for boson stars in the multi-scalar field theory with global symmetry . The properties of the boson stars are investigated by the Newtonian approximati…
Spontaneous Compactification of Bimetric Theory
Nahomi Kan, Takuya Maki, Kiyoshi Shiraishi
We propose a model of bimetric gravity in which the mixing of metrics naturally gives a mass to a graviton by the compactification with flux of two gauge fields in extra dimensions…
Critical Higher Order Gravities in Higher Dimensions
Nahomi Kan, Koichiro Kobayashi, Kiyoshi Shiraishi
We show that the higher order gravity model proposed by Meissner and Olechowski has a graviton mode, a massive spin-two excitation and no scalar mode in a maximally symmetric space…