95 citations · 570 across the 24 of their papers we have counts for
7 papers · 1 filter
Is quantum teleportation beyond horizon possible?
Jun-ichirou Koga, Kengo Maeda
We ask whether quantum teleportation from the outside to the inside of a horizon is possible, using entanglement extracted from a vacuum. We first calculate analytically, within th…
A holographic superconductor model in a spatially anisotropic background
Jun-ichirou Koga, Kengo Maeda, Kentaro Tomoda
We investigate an anisotropic model of superconductors in the Einstein-Maxwell-dilaton theory with a charged scalar field. It is found that the critical temperature decreases as th…
The first law of AdS black holes in higher curvature gravity
Jun-ichirou Koga
We consider the first law of black hole thermodynamics in an asymptotically anti-de Sitter spacetime in the class of gravitational theories whose gravitational Lagrangian is an arb…
Asymptotically anti-de Sitter spacetimes and conserved quantities in higher curvature gravitational theories
Naoya Okuyama, Jun-ichirou Koga
We consider -dimensional asymptotically anti-de Sitter spacetimes in higher curvature gravitational theories with , by employing the conformal completion technique. We…
Near-Horizon Conformal Symmetry and Black Hole Entropy in Any Dimension
Gungwon Kang, Jun-ichirou Koga, Mu-In Park
Recently, Carlip proposed a derivation of the entropy of the two-dimensional dilatonic black hole by investigating the Virasoro algebra associated with a newly introduced near-hori…
Evaporation and Fate of Dilatonic Black Holes
Jun-ichirou Koga, Kei-ichi Maeda
We study both spherically symmetric and rotating black holes with dilaton coupling and discuss the evaporation of these black holes via Hawking's quantum radiation and their fates.…