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Conditions for one-dimensional supersonic flow of quantum gases

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arxiv cond-mat/0405007 v3 pith:MKP4TQBQ submitted 2004-05-01 cond-mat.soft gr-qc

S. Giovanazzi , C. Farrell , T. Kiss , U. Leonhardt This is my paper · ORCID
classification cond-mat.softgr-qc
keywords supersonichawkingpotentialcondensatesconditionsflowtemperatureacoustic
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One can use transsonic Bose-Einstein condensates of alkali atoms to establish the laboratory analog of the event horizon and to measure the acoustic version of Hawking radiation. We determine the conditions for supersonic flow and the Hawking temperature for realistic condensates on waveguides where an external potential plays the role of a supersonic nozzle. The transition to supersonic speed occurs at the potential maximum and the Hawking temperature is entirely determined by the curvature of the potential.

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  1. Non-local correlations of a test quantum field in gravitational collapse

    gr-qc 2025-05 conditional novelty 6.0 of 10

    Equal-time vacuum correlations of a test quantum field on a dynamically collapsing, horizon-forming spacetime develop non-local peaks across the apparent horizon, and the outside peak moves away from the horizon over time.

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