Density correlations in ultracold atomic Fermi gases


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BELZIG, Wolfgang, Christian SCHROLL, Christoph BRUDER, 2007. Density correlations in ultracold atomic Fermi gases. In: Physical Review. 75, pp. 1-5. ISSN 1050-2947. eISSN 1094-1622. Available under: doi: 10.1063/1.2036873

@article{Belzig2007Densi-4998, title={Density correlations in ultracold atomic Fermi gases}, year={2007}, doi={10.1063/1.2036873}, volume={75}, issn={1050-2947}, journal={Physical Review}, pages={1--5}, author={Belzig, Wolfgang and Schroll, Christian and Bruder, Christoph}, note={Article Number: 63611} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:available rdf:datatype="">2011-03-24T14:52:23Z</dcterms:available> <bibo:uri rdf:resource=""/> <dc:contributor>Belzig, Wolfgang</dc:contributor> <dcterms:rights rdf:resource=""/> <dcterms:title>Density correlations in ultracold atomic Fermi gases</dcterms:title> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dc:creator>Belzig, Wolfgang</dc:creator> <dcterms:hasPart rdf:resource=""/> <dc:creator>Bruder, Christoph</dc:creator> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:language>eng</dc:language> <dcterms:bibliographicCitation>First publ. in: Physical Review A 75 (2007), pp. 1-5</dcterms:bibliographicCitation> <dcterms:abstract xml:lang="eng">We investigate density fluctuations in a coherent ensemble of interacting fermionic atoms. 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. Using the mean-field BCS state to describe the whole interval between the BCS limit and the Bose-Einstein condensate (BEC) limit, we obtain an exact expression for the cumulant-generating function of the density fluctuations of an atomic cloud. In the two-dimensional case, we obtain a closed analytical expression. Poissonian fluctuations of a molecular condensate on the BEC side are strongly suppressed on the BCS side. The size of the fluctuations in the BCS limit is a direct measure of the pairing potential. We also discuss the BEC-BCS crossover of the third cumulant and the temperature dependence of the second cumulant.</dcterms:abstract> <dc:creator>Schroll, Christian</dc:creator> <dc:contributor>Bruder, Christoph</dc:contributor> <dcterms:issued>2007</dcterms:issued> <dc:rights>terms-of-use</dc:rights> <dc:format>application/pdf</dc:format> <dc:date rdf:datatype="">2011-03-24T14:52:23Z</dc:date> <dc:contributor>Schroll, Christian</dc:contributor> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dspace:hasBitstream rdf:resource=""/> </rdf:Description> </rdf:RDF>

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