2007/02/28 by Jae-Weon Lee, Lee, Jae-Weon, Jaewan Kim +3
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #Geophysics and Gravity Measurements #High Energy Physics - Theory (hep-th) #Quantum Physics (quant-ph) #Relativity and Gravitational Theory #hep-th #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0702264
title changed
openalex publication_date 2007/02/28 · arxiv created 2007/04/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using the thermal Green's function approach we propose a general method to investigate entanglement of the vacuum state or thermal ground states in an arbitrary dimensional space-time. As an application we show quantum separability of the massive thermal scalar field vacuum in the 1+1 dimensional cylindrical space-time. Separability is demonstrated using the positive partial transpose criterion for effective two-mode Gaussian states of collective operators. In this case, for all mass and temperature values entanglement is absent between the collective operators.