Detecting spacelike vacuum entanglement at all distances and promoting negativity to a necessary and sufficient entanglement measure in many-body regimes

Autor:	Gao, Boyu, Klco, Natalie
Rok vydání:	2024
Předmět:	Quantum Physics High Energy Physics - Lattice Nuclear Theory
Druh dokumentu:	Working Paper
Popis:	Though known to be present, the accessibility of spacelike vacuum entanglement capable of being a fundamental resource for quantum information processing has remained in question at distances beyond the scale of vacuum fluctuations in massive fields. For a broad subclass of physical many-body mixed Gaussian states, including the free scalar field vacuum, the logarithmic negativity is here shown to be a necessary and sufficient measure of entanglement and to be entirely accessible by pairs of single-mode detectors in the continuum. By deriving exact and optimal detection profiles, entanglement resources in the massive field are demonstrated to be available at all distances. Comment: 5 pages, 4 appendices, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2410.04162 Zobrazit plný text záznamu View this record from Arxiv