Inherent quantum resources in stationary spin chains
The standard way to generate many-body quantum correlations is via a dynamical protocol: an initial product state is transformed by interactions that generate nonclassical 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 present in the eigenstates of the Lipkin-Meshkov-Glick model 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.
Authors
- Jan Chwedeńczuk (ORCID: https://orcid.org/0000-0002-9250-4227)
- Maciej Lewenstein (ORCID: https://orcid.org/0000-0002-0210-7800)
- Marcin Płodzień (ORCID: https://orcid.org/0000-0002-0835-1644)
Institutions
- Institució Catalana de Recerca i Estudis Avançats (ES)
- Shanghai Institute for Science of Science (CN)
- Barcelona Institute of Science and Technology (ES)
- Institute of Science and Technology
- University of Warsaw (PL)
Publication Details
- Journal
- Physical review. A/Physical review, A
- Published
- 2025-01-09
- DOI
- https://doi.org/10.1103/physreva.111.012417
- Citations
- 4
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 9.92
Funders
- “la Caixa” Foundation
- Generalitat de Catalunya
- Narodowe Centrum Nauki
- Barcelona Supercomputing Center
- European Research Council
- Agència de Gestió d'Ajuts Universitaris i de Recerca
- Horizon 2020
- European Regional Development Fund
- Agencia Estatal de Investigación