171 citations · 923 across the 18 of their papers we have counts for
18 papers
Aspects of Pseudo Entropy in Field Theories
Ali Mollabashi, Noburo Shiba, Tadashi Takayanagi +2
In this article, we explore properties of pseudo entropy [1] in quantum field theories and spin systems from several approaches. Pseudo entropy is a generalization of entanglement…
Holographic moving mirrors
Ibrahim Akal, Yuya Kusuki, Noburo Shiba +2
Moving mirrors have been known as tractable setups modeling Hawking radiation from black holes. In this paper, motivated by recent developments regarding the black hole information…
Entanglement entropy in holographic moving mirror and Page curve
Ibrahim Akal, Yuya Kusuki, Noburo Shiba +2
We calculate the time evolution of entanglement entropy in two dimensional conformal field theory with a moving mirror. For a setup modeling Hawking radiation, we obtain a linear g…
Pseudo Entropy in Free Quantum Field Theories
Ali Mollabashi, Noburo Shiba, Tadashi Takayanagi +2
Pseudo entropy is an interesting quantity with a simple gravity dual, which generalizes entanglement entropy such that it depends on both an initial and a final state. Here we reve…
Direct Calculation of Mutual Information of Distant Regions
Noburo Shiba
We consider the (Renyi) mutual information, , of distant compact spatial regions A and B in the vacuum state of a free sc…
Entanglement Entropy and Decoupling in the Universe
Yuichiro Nakai, Noburo Shiba, Masaki Yamada
In the expanding universe, two interacting fields are no longer in thermal contact when the interaction rate becomes smaller than the Hubble expansion rate. After decoupling, two s…
The Aharonov-Bohm Effect on Entanglement Entropy in Conformal Field Theory
Noburo Shiba
We consider the Aharonov-Bohm effect on entanglement entropy for one interval in (1+1) dimensional conformal field theory on a one dimensional ring. The magnetic field is confined…
EPR Pairs, Local Projections and Quantum Teleportation in Holography
Tokiro Numasawa, Noburo Shiba, Tadashi Takayanagi +1
In this paper we analyze three quantum operations in two dimensional conformal field theories (CFTs): local projection measurements, creations of partial entanglement between two C…
Double-Trace Deformations and Entanglement Entropy in AdS
Taiki Miyagawa, Noburo Shiba, Tadashi Takayanagi
We compute the bulk entanglement entropy of a massive scalar field in a Poincare AdS with the Dirichlet and Neumann boundary condition when we trace out a half space. Moreover, by…
Gravity Dual of Quantum Information Metric
Masamichi Miyaji, Tokiro Numasawa, Noburo Shiba +2
We study a quantum information metric (or fidelity susceptibility) in conformal field theories with respect to a small perturbation by a primary operator. We argue that its gravity…
cMERA as Surface/State Correspondence in AdS/CFT
Masamichi Miyaji, Tokiro Numasawa, Noburo Shiba +2
We present how the surface/state correspondence, conjectured in arXiv:1503.03542, works in the setup of AdS3/CFT2 by generalizing the formulation of cMERA. The boundary states in c…
On the definition of entanglement entropy in lattice gauge theories
Sinya Aoki, Takumi Iritani, Masahiro Nozaki +3
We focus on the issue of proper definition of entanglement entropy in lattice gauge theories, and examine a naive definition where gauge invariant states are viewed as elements of…
Entanglement Entropy of Disjoint Regions in Excited States : An Operator Method
Noburo Shiba
We develop the computational method of entanglement entropy based on the idea that is written as the expectation value of the local operator, where is a density mat…
Entanglement between Two Interacting CFTs and Generalized Holographic Entanglement Entropy
Ali Mollabashi, Noburo Shiba, Tadashi Takayanagi
In this paper we discuss behaviors of entanglement entropy between two interacting CFTs and its holographic interpretation using the AdS/CFT correspondence. We explicitly perform a…
Volume Law for the Entanglement Entropy in Non-local QFTs
Noburo Shiba, Tadashi Takayanagi
In this paper, we present a simple class of non-local field theories whose ground state entanglement entropy follows a volume law as long as the size of subsystem is smaller than a…
Superluminal Propagation Caused by Radiative Corrections in a Uniform Electromagnetic Field
Noburo Shiba
We consider the effect of radiative corrections on the maximum velocity of propagation of neutral scalar fields in a uniform electromagnetic field. The propagator of neutral scalar…
Entanglement Entropy of Two Spheres
Noburo Shiba
We study the entanglement entropy S_{AB} of a massless free scalar field on two spheres A and B whose radii are R_1 and R_2, respectively, and the distance between the centers of t…
Entanglement Entropy of Two Black Holes and Entanglement Entropic Force
Noburo Shiba
We study the entanglement entropy, , of a massless free scalar field on the outside region of two black holes and whose radii are and and how it depend…