All coherent field states entangle equally
Quantum Physics
2021-12-07 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the post-interaction density matrices of i) a single detector, ii) two detectors, and iii) the partial transpose of the latter, are all independent of which coherent state the field was in. A consequence of these results is that a detector pair can harvest the same amount of entanglement from any coherent field state as from the vacuum.
Keywords
Cite
@article{arxiv.1705.04341,
title = {All coherent field states entangle equally},
author = {Petar Simidzija and Eduardo Martin-Martinez},
journal= {arXiv preprint arXiv:1705.04341},
year = {2021}
}
Comments
11 pages. RevTeX 4.1. Updated to fix minor typos