Timelike entanglement entropy revisited

Physical review. D/Physical review. D. 2026 Open access

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Authors: Xin Jiang, Haitang Yang
DOI: 10.1103/rl9b-373v
Cited by: 1
References: 52

Abstract

We present an operator-algebraic definition for timelike entanglement entropy in quantum field theory under a few mild postulates. This rigorously defined timelike entanglement entropy is real-valued due to the timelike tube theorem. We further demonstrate why the timelike entanglement entropy should be real-valued from both path integral argument and holography perspective.

Fields of Study & Subjects

Quantum many-body systems Statistical Mechanics and Entropy Advanced Thermodynamics and Statistical Mechanics

Publication details

Journal / source
Physical review. D/Physical review. D.
Publisher
American Physical Society (APS)
Volume
113
Issue
10
Publication date
12 May 2026
Language
EN