Induced density correlations in a sonic black hole condensate
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 26, 2017
- Source ID
- 10.21468/scipostphys.3.3.022
Entities
People
- Charles Winthrop Clark
- Mark Edwards
- Ted Jacobson
- Yi-hsieh Wang
Organizations
- Army Research Office
- Georgia Southern University
- National Institute of Standards and Technology
- National Science Foundation
- University of Maryland