Density correlations in ultracold atomic Fermi gases

Journal Article · Thu Aug 25 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2036873· OSTI ID:20719222

Belzig, Wolfgang; Schroll, Christian; Bruder, Christoph ^[1]

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1. Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, 4056 Basel (Switzerland)

We investigate density fluctuations in a coherent ensemble of interacting fermionic atoms around the BEC-BCS crossover. Adapting the concept of full counting statistics, well-known from quantum optics and mesoscopic electron transport, we study second-order as well as higher-order correlators of density fluctuations. This method is applied to the crossover from a molecular BEC state to a fermionic BCS state and yields a transition from Poissonian statistics to binomial statistics. The statistics can thus be used as an experimental tool to gain information on the many-body ground state in the crossover regime.

• OSTI ID: 20719222
• Journal Information: AIP Conference Proceedings, Vol. 780, Issue 1; Conference: ICNF 2005: 18. international conference on noise and fluctuations, Salamanca (Spain), 19-23 Sep 2005; Other Information: DOI: 10.1063/1.2036873; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
CHARGED-PARTICLE TRANSPORT
CORRELATIONS
DENSITY
ELECTRONS
FERMI GAS
FLUCTUATIONS
GROUND STATES
MANY-BODY PROBLEM
NOISE
QUANTUM MECHANICS
STATISTICS