Tomonori Ugajin

activity

20122026

most citedThermodynamical Property of Entanglement Entropy for Excited States

280 citations · 378 across the 16 of their papers we have counts for

collaborators

Showing 2018Show all

3 papers · 1 filter

hep-th2018

Perturbative expansions of Rényi relative divergences and holography

Tomonori Ugajin

In this paper, we develop a novel way to perturbatively calculate Rényi relative divergences $D_{γ} (ρ ∣∣ σ) = tr ρ^{γ} σ^{1 - γ}$ and related quantities without using replica trick a…

hep-th2018

Towards an Entanglement Measure for Mixed States in CFTs Based on Relative Entropy

Tadashi Takayanagi, Tomonori Ugajin, Koji Umemoto

Relative entropy of entanglement (REE) is an entanglement measure of bipartite mixed states, defined by the minimum of the relative entropy $S (ρ_{A B} ∣∣ σ_{A B})$ between a given mix…

hep-th2018

Chaos and relative entropy

Yuya O. Nakagawa, Gábor Sárosi, Tomonori Ugajin

One characterization of a chaotic system is the quick delocalization of quantum information (fast scrambling). One therefore expects that in such a system a state quickly becomes l…