Impurity transport through a strongly interacting bosonic quantum gas

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JOHNSON, T.H., Stephen CLARK, Martin BRUDERER, Dieter JAKSCH, 2011. Impurity transport through a strongly interacting bosonic quantum gas. In: Physical Review A. 84(2). ISSN 1050-2947. Available under: doi: 10.1103/PhysRevA.84.023617

@article{Johnson2011Impur-16166, title={Impurity transport through a strongly interacting bosonic quantum gas}, year={2011}, doi={10.1103/PhysRevA.84.023617}, number={2}, volume={84}, issn={1050-2947}, journal={Physical Review A}, author={Johnson, T.H. and Clark, Stephen and Bruderer, Martin and Jaksch, Dieter} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:language>eng</dc:language> <dc:contributor>Jaksch, Dieter</dc:contributor> <dc:creator>Bruderer, Martin</dc:creator> <dcterms:isPartOf rdf:resource=""/> <dcterms:title>Impurity transport through a strongly interacting bosonic quantum gas</dcterms:title> <dc:contributor>Johnson, T.H.</dc:contributor> <dcterms:available rdf:datatype="">2012-01-04T09:01:00Z</dcterms:available> <bibo:uri rdf:resource=""/> <dc:creator>Johnson, T.H.</dc:creator> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:issued>2011</dcterms:issued> <dc:rights>terms-of-use</dc:rights> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Jaksch, Dieter</dc:creator> <dcterms:bibliographicCitation>First publ. in: Physical Review A ; 84 (2011), 2. - 023617</dcterms:bibliographicCitation> <dc:contributor>Bruderer, Martin</dc:contributor> <dcterms:abstract xml:lang="eng">Using near-exact numerical simulations, we study the propagation of an impurity through a one-dimensional Bose lattice gas for varying bosonic interaction strengths and filling factors at zero temperature. The impurity is coupled to the Bose gas and confined to a separate tilted lattice. The precise nature of the transport of the impurity is specific to the excitation spectrum of the Bose gas, which allows one to measure properties of the Bose gas nondestructively, in principle, by observing the impurity; herewe focus on the spatial and momentum distributions of the impurity as well as its reduced density matrix. For instance, we show it is possible to determine whether the Bose gas is commensurately filled as well as the bandwidth and gap in its excitation spectrum. Moreover, we show that the impurity acts as a witness to the crossover of its environment from the weakly to the strongly interacting regime, i.e., from a superfluid to a Mott insulator or Tonks-Girardeau lattice gas, and the effects on the impurity in both of these strongly interacting regimes are clearly distinguishable. Finally, we find that the spatial coherence of the impurity is related to its propagation through the Bose gas.</dcterms:abstract> <dcterms:rights rdf:resource=""/> <dspace:isPartOfCollection rdf:resource=""/> <dc:contributor>Clark, Stephen</dc:contributor> <dc:creator>Clark, Stephen</dc:creator> <dc:date rdf:datatype="">2012-01-04T09:01:00Z</dc:date> </rdf:Description> </rdf:RDF>

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