Inherent quantum resources in the stationary spin chains

Autor:	Płodzień, Marcin, Chwedeńczuk, Jan, Lewenstein, Maciej
Rok vydání:	2024
Předmět:	Quantum Physics Condensed Matter - Quantum Gases
Druh dokumentu:	Working Paper
Popis:	The standard way to generate many-body quantum correlations is via a dynamical protocol: an initial product state is transformed by interactions that generate non-classical correlations at later times. Here, we show that many-body Bell correlations are inherently present in the eigenstates of a variety of spin-1/2 chains. In particular, we show that the eigenstates and thermal states of the collective Lipkin-Meshkov-Glick model possess many-body Bell correlations. We demonstrate that the Bell correlations can take on quantized values that change discontinuously with variations in the total magnetization. Finally, we show that these many-body Bell correlations persist even in the presence of both diagonal and off-diagonal disorder. Comment: 12 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2405.16974 Zobrazit plný text záznamu View this record from Arxiv