48 citations · 274 across the 30 of their papers we have counts for
30 papers
Covariant BRST Quantization of Unimodular Gravity I -- Formulation with antisymmetric tensor ghosts --
Taichiro Kugo, Ryuichi Nakayama, Nobuyoshi Ohta
Unimodular gravity (UG) is an interesting theory that may explain why the cosmological constant is extremely small, in contrast to general relativity (GR). The theory has only the…
Covariant BRST Quantization of Unimodular Gravity II -- Formulation with a vector antighost --
Taichiro Kugo, Ryuichi Nakayama, Nobuyoshi Ohta
In our previous paper, we have presented a covariant BRST quantization of unimodular gravity which may account for the smallness of the cosmological constant, and have shown that t…
BRST Quantization of General Relativity in Unimodular Gauge and Unimodular Gravity
Taichiro Kugo, Ryuichi Nakayama, Nobuyoshi Ohta
Unimodular gravity (UG) is an important theory which may explain the smallness of the cosmological constant. To get insight into the covariant quantization of UG, we discuss the BR…
On Unimodular Gauge of Quantum Gravity
Ryuichi Nakayama
BRST-invariant action of general relativity in the unimodular gauge proposed by Baulieu is studied without using perturbative expansions. The expression for the path integral in th…
Interior of the Horizon of BTZ Black Hole
Ryuichi Nakayama, Kenji Shiohara
A quantum scalar field inside the horizon of a non-rotating BTZ black hole is studied. Not only the near-horizon modes but also the normal modes deep inside the horizon are obtaine…
Holographic Duality for 3D Spin-3 Gravity Coupled to Scalar Field
Ryuichi Nakayama, Kenji Shiohara, Tomotaka Suzuki
The 3d spin-3 gravity theory is holographically dual to a 2d -extended CFT. In a large-c limit the symmetry algebra of the CFT reduces to . On t…