4 citations · 9 across the 6 of their papers we have counts for
6 papers
Fan-Wang type regular black holes in Quasi-Topological Gravity
Ren Tsuda, Ryotaku Suzuki, Shinya Tomizawa
We construct a class of regular black hole solutions of the Fan-Wang type within quasi-topological gravity (QTG) in arbitrary spacetime dimensions greater than four. In contrast to…
Existence conditions of nonsingular dyonic black holes in nonlinear electrodynamics
Ren Tsuda, Ryotaku Suzuki, Shinya Tomizawa
General relativity coupled to nonlinear electrodynamics is known to have nonsingular black hole solutions. We investigate the existence conditions for such solutions in two-paramet…
Acoustic black and white holes of potential flow in a tube
Ren Tsuda, Shinya Tomizawa, Ryotaku Suzuki
We propose a new simple model of acoustic black hole in a thin tube, where the difference in the gravitational potential is used to create a transonic flow. The main merit of our t…
Higher Dimensional Polytopal Universe in Regge Calculus
Ren Tsuda, Takanori Fujiwara
Higher dimensional closed Friedmann-Lemaître-Robertson-Walker (FLRW) universe with positive cosmological constant is investigated by Regge calculus. A Cauchy surface of discretized…
Oscillating 4-Polytopal Universe in Regge Calculus
Ren Tsuda, Takanori Fujiwara
The discretized closed Friedmann-Lemaître-Robertson-Walker (FLRW) universe with positive cosmological constant is investigated by Regge calculus. According to the Collins-Williams…
Expanding Polyhedral Universe in Regge Calculus
Ren Tsuda, Takanori Fujiwara
The closed Friedmann--Lemaître--Robertson--Walker (FLRW) universe of Einstein gravity with positive cosmological constant in three dimensions is investigated by using the Collins--…