Bipartite nonlocality with a many-body system
| Autor: | Nicolas Sangouard, Enky Oudot, Pavel Sekatski, Jean-Daniel Bancal |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Quantum Physics Conjecture Spins General Physics and Astronomy FOS: Physical sciences Observable 01 natural sciences 010305 fluids & plasmas Moment (mathematics) Quantum nonlocality Theoretical physics Bell's theorem 0103 physical sciences Bipartite graph 010306 general physics Quantum Physics (quant-ph) Quantum |
| DOI: | 10.48550/arxiv.1810.05636 |
| Popis: | We consider a bipartite scenario where two parties hold ensembles of $1/2$-spins which can only be measured collectively. We give numerical arguments supporting the conjecture that in this scenario no Bell inequality can be violated for arbitrary numbers of spins if only first order moment observables are available. We then give a recipe to achieve a significant Bell violation with a split many-body system when this restriction is lifted. This highlights the strong requirements needed to detect bipartite quantum correlations in many-body systems device-independently. Comment: 7+5 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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