Violation of Bell inequalities in an analogue black hole

Abstract

Signals of entanglement and nonlocality are quantitatively evaluated at zero and finite temperature in an analogue black hole realized in the flow of a quasi one-dimensional Bose-Einstein condensate. The violation of Lorentz invariance inherent to this analog system opens the prospect to observe 3-mode quantum correlations and we study the corresponding violation of bipartite and tripartite Bell inequalities. It is shown that the long wavelength modes of the system are maximally entangled, in the sense that they realize a superposition of continuous variable versions of Greenberger-Horne-Zeilinger states whose entanglement resists partial tracing.

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• Toward the Observation of Entangled Pairs in BEC analogue Expanding Universes
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• Stimulated Hawking effect and quasinormal mode resonance in a polariton simulator of field theory on curved spacetime
• Bell correlations between momentum-entangled pairs of ${}^4{\text{He}}^{\ast }$ atoms
• Testing Single Photon Entanglement using Self-Referential Measurements
• Bosonic and fermionic mutual information of N-partite systems in dilaton black hole background
• Time Crystal from Self-Amplification of Spontaneous Analog Hawking Radiation
• Non-monotonic evolution of multipartite entanglement under the Unruh effect