Quantum signature of analog Hawking radiation in momentum space

Abstract

We consider a sonic analog of a black hole realized in the one-dimensional flow of a Bose-Einstein condensate. Our theoretical analysis demonstrates that one- and two-body momentum distributions accessible by present-day experimental techniques provide clear direct evidence (i) of the occurrence of a sonic horizon, (ii) of the associated acoustic Hawking radiation and (iii) of the quantum nature of the Hawking process. The signature of the quantum behavior persists even at temperatures larger than the chemical potential.

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• Observation of quantum Hawking radiation and its entanglement in an analogue black hole
• Observation of noise correlated by the Hawking effect in a water tank
• Synthetic Unruh effect in cold atoms
• Probing the scale invariance of the inflationary power spectrum in expanding quasi-two-dimensional dipolar condensates
• Departing from thermality of analogue Hawking radiation in a Bose-Einstein condensate
• Polariton fluids for analogue gravity physics
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• Verifying the upper bound on the speed of scrambling with the analogue Hawking radiation of trapped ions
• Mechanism of stimulated Hawking radiation in a laboratory Bose-Einstein condensate
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