Macroscopically nonlocal quantum correlations
arXiv:2104.03988 · doi:10.1103/PhysRevLett.127.120401
Abstract
It is usually believed that coarse-graining of quantum correlations leads to classical correlations in the macroscopic limit. Such a principle, known as macroscopic locality, has been proved for correlations arising from independent and identically distributed (IID) entangled pairs. In this letter we consider the generic (non-IID) scenario. We find that the Hilbert space structure of quantum theory can be preserved in the macroscopic limit. This leads directly to a Bell violation for coarse-grained collective measurements, thus breaking the principle of macroscopic locality.
arXiv comment12 pages, 1 figure
References in corpus (19)
- Classical world arising out of quantum physics under the restriction of coarse-grained measurements
- A glance beyond the quantum model
- Bell Correlations in a Bose-Einstein Condensate
- Detecting non-locality in multipartite quantum systems with two-body correlation functions
- Condition for macroscopic realism beyond the Leggett-Garg inequalities
- Optimal States for Bell inequality Violations using Quadrature Phase Homodyne Measurements
- Coarsening Measurement References and the Quantum-to-Classical Transition
- Macroscopic Observables
- Linking Measures for Macroscopic Quantum States via Photon-Spin Mapping
- Testing a Bell inequality in multi-pair scenarios
- Macroscopic non-contextuality as a principle for Almost Quantum Correlations
- Entropic Uncertainty Relations and the Quantum-to-Classical transition
- Environment induced entanglement in many-body mesoscopic systems
- On monogamy of non-locality and macroscopic averages: examples and preliminary results
- Bipartite nonlocality with a many-body system
- Many-box locality
- Experimental many-pairs nonlocality
- Bell Non-Locality in Macroscopic Systems
- Bell nonlocality with intensity information only