Induced density correlations in a sonic black hole condensate
Yi-Hsieh Wang, Ted Jacobson, Mark Edwards, Charles W. Clark
SciPost Phys. 3, 022 (2017) · published 26 September 2017
- doi: 10.21468/SciPostPhys.3.3.022
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Abstract
Analog black/white hole pairs, consisting of a region of supersonic flow, have been achieved in a recent experiment by J. Steinhauer using an elongated Bose-Einstein condensate. A growing standing density wave, and a checkerboard feature in the density-density correlation function, were observed in the supersonic region. We model the density-density correlation function, taking into account both quantum fluctuations and the shot-to-shot variation of atom number normally present in ultracold-atom experiments. We find that quantum fluctuations alone produce some, but not all, of the features of the correlation function, whereas atom-number fluctuation alone can produce all the observed features, and agreement is best when both are included. In both cases, the density-density correlation is not intrinsic to the fluctuations, but rather is induced by modulation of the standing wave caused by the fluctuations.
Cited by 22
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Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 2 Yi-Hsieh Wang,
- 1 Theodore Jacobson,
- 1 3 Mark Edwards,
- 1 2 Charles Clark
- 1 National Institute of Standards and Technology [NIST]
- 2 University of Maryland, College Park [UMCP]
- 3 Georgia Southern University
- Army Research Office (ARO) (through Organization: United States Army Research Laboratory [ARL])
- National Science Foundation [NSF]