49 citations · 97 across the 6 of their papers we have counts for
6 papers
Double Holography of Entangled Universes
Robert C. Myers, Shan-Ming Ruan, Tomonori Ugajin
We employ double holography to examine a system of two entangled gravitating universes that live on two codimension-one branes in an asymptotically AdS spacetime with two disjo…
The Petz (lite) recovery map for scrambling channel
Yasuaki Nakayama, Akihiro Miyata, Tomonori Ugajin
We study properties of the Petz recovery map in chaotic systems, such as the Hayden-Preskill setup for evaporating black holes and the SYK model. Since these systems exhibit the ph…
de Sitter space is sometimes not empty
Vijay Balasubramanian, Yasunori Nomura, Tomonori Ugajin
Multiple lines of evidence suggest that the Hilbert space of an isolated de Sitter universe is one dimensional but can appear larger when probed by a gravitating observer. To test…
Relative entropy of excited states in conformal field theories of arbitrary dimensions
Gábor Sárosi, Tomonori Ugajin
Extending our previous work, we study the relative entropy between the reduced density matrices obtained from globally excited states in conformal field theories of arbitrary dimen…
Holographic Entanglement and Causal Shadow in Time-Dependent Janus Black Hole
Yuki Nakaguchi, Noriaki Ogawa, Tomonori Ugajin
We holographically compute an inter-boundary entanglement entropy in a time-dependent two-sided black hole which was constructed in hep-th/0701108 by applying time-dependent Janus…
Supersymmetric Rényi Entropy in Five Dimensions
Naofumi Hama, Tatsuma Nishioka, Tomonori Ugajin
We introduce supersymmetric Rényi entropies for supersymmetric gauge theories in five dimensions. The matrix model representation is obtained using the localization…