104 citations · 405 across the 19 of their papers we have counts for
19 papers
4D Weyl Anomaly and Diversity of the Interior Structure of Quantum Black Hole
Pei-Ming Ho, Hikaru Kawai, Henry Liao +1
We study the interior metric of 4D spherically symmetric static black holes by using the semi-classical Einstein equation and find a consistent class of geometries with large curva…
Self-Gravity and Bekenstein-Hawking Entropy
Yuki Yokokura
We study the effect of self-gravity on entropy by directly solving the 4D semi-classical Einstein equation. In particular, we focus on whether the Bekenstein-Hawking formula holds…
Planckian Physics Comes Into Play At Planckian Distance From Horizon
Pei-Ming Ho, Hikaru Kawai, Yuki Yokokura
In the background of a gravitational collapse, we compute the transition amplitudes for the creation of particles for distant observers due to higher-derivative interactions in add…
Interior Metric of Slowly Formed Black Holes in a Heat Bath
Hikaru Kawai, Yuki Yokokura
We study a spherical black hole formed slowly in a heat bath in the context of ordinary field theory, which we expect to have the typical properties of black holes. We assume that…
Firewall From Effective Field Theory
Pei-Ming Ho, Yuki Yokokura
For an effective field theory in the background of an evaporating black hole with spherical symmetry, we consider non-renormalizable interactions and their relevance to physical ef…
Black Hole as a Quantum Field Configuration
Hikaru Kawai, Yuki Yokokura
We describe 4D evaporating black holes as quantum field configurations by solving the semi-classical Einstein equation and quantum matter fie…
Distance between collapsing matter and trapping horizon in evaporating black holes
Pei-Ming Ho, Yoshinori Matsuo, Yuki Yokokura
Assuming that the vacuum energy-momentum tensor is not exceptionally large, we consider 4D evaporating black holes with spherical symmetry and evaluate the proper distance bet…
An Analytic Description of Semi-Classical Black-Hole Geometry
Pei-Ming Ho, Yoshinori Matsuo, Yuki Yokokura
We study analytically the spacetime geometry of the black-hole formation and evaporation. As a simplest model of the collapse, we consider a spherical thin shell, and take the back…
Thermodynamical path integral and emergent symmetry
Shin-ichi Sasa, Sho Sugiura, Yuki Yokokura
We investigate a thermally isolated quantum many-body system with an external control represented by a step protocol of a parameter. The propagator at each step of the parameter ch…
Back Reaction of 4D Conformal Fields on Static Geometry
Pei-Ming Ho, Hikaru Kawai, Yoshinori Matsuo +1
Static, spherically symmetric solutions to the semi-classical Einstein equation are studied, including the effect of the quantum energy-momentum tensor for conformal matters with 4…
A Model of Black Hole Evaporation and 4D Weyl Anomaly
Hikaru Kawai, Yuki Yokokura
We analyze time evolution of a spherically-symmetric collapsing matter from a point of view that black holes evaporate by nature. We consider conformal matters and solve the semi-c…
Thermal pure state path integral and emergent symmetry
Shin-ichi Sasa, Sho Sugiura, Yuki Yokokura
We investigate a thermally isolated quantum many-body system with an external control represented by a time-dependent parameter. We formulate a path integral in terms of thermal pu…
Thermodynamic entropy as a Noether invariant
Shin-ichi Sasa, Yuki Yokokura
We study a classical many-particle system with an external control represented by a time-dependent extensive parameter in a Lagrangian. We show that thermodynamic entropy of the sy…
Interior of Black Holes and Information Recovery
Hikaru Kawai, Yuki Yokokura
We analyze time evolution of a spherically symmetric collapsing matter from a point of view that black holes evaporate by nature. We first consider a spherical thin shell that fall…
Phenomenological Description of the Interior of the Schwarzschild Black Hole
Hikaru Kawai, Yuki Yokokura
We discuss a sufficiently large 4-dimensional Schwarzschild black hole which is in equilibrium with a heat bath. In other words, we consider a black hole which has grown up from a…
Non-equilibrium thermodynamics of gravitational screens
Laurent Freidel, Yuki Yokokura
We study the Einstein gravity equations projected on a timelike surface, which represents the time evolution of what we call a gravitational screen. We show that such a screen beha…
A Self-consistent Model of the Black Hole Evaporation
Hikaru Kawai, Yoshinori Matsuo, Yuki Yokokura
We construct a self-consistent model which describes a black hole from formation to evaporation including the back reaction from the Hawking radiation. In the case where a null she…
Spacetime Structure of the Black Hole Evaporation
Hikaru Kawai, Yoshinori Matsuo, Yuki Yokokura
We study a self-consistent solution of the semi-classical Einstein equation including the back reaction from the Hawking radiation. Our geometry is constructed by connecting flat s…
Entropy Balance Equation of Spacetime Thermodynamics in f(R) Gravity
Yuki Yokokura
We study spacetime thermodynamics for non-equilibrium processes. We first generalize the formulation of spacetime thermodynamics by using an observer outside the horizon. Then we c…