Interaction-controlled transport of an ultracold Fermi gas

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dc.creatorStrohmaier, Niels
dc.creatorTakasu, Yosuke
dc.creatorGünter, Kenneth
dc.creatorJördens, Robert
dc.creatorKöhl, Michael
dc.creatorMoritz, Henning
dc.creatorEsslinger, Tilman
dc.date2007-07-20
dc.date2007-12-05
dc.date.accessioned2026-07-07T08:47:04Z
dc.date.available2026-07-07T08:47:04Z
dc.descriptionWe explore the transport properties of an interacting Fermi gas in a three-dimensional optical lattice. The center of mass dynamics of the atoms after a sudden displacement of the trap minimum is monitored for different interaction strengths and lattice fillings. With increasingly strong attractive interactions the weakly damped oscillation, observed for the non-interacting case, turns into a slow relaxational drift. Tuning the interaction strength during the evolution allows us to dynamically control the transport behavior. Strong attraction between the atoms leads to the formation of local pairs with a reduced tunneling rate. The interpretation in terms of pair formation is supported by a measurement of the number of doubly occupied lattice sites. This quantity also allows us to determine the temperature of the non-interacting gas in the lattice to be as low as (27\pm2)% of the Fermi temperature.
dc.description4 pages, 4 Postscript figures
dc.identifierhttps://arxiv.org/abs/0707.3140
dc.identifierhttp://arxiv.org/abs/0707.3140
dc.identifierPhys. Rev. Lett. 99, 220601 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.220601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143471
dc.subjectStrongly Correlated Electrons
dc.subjectQuantum Physics
dc.titleInteraction-controlled transport of an ultracold Fermi gas
dc.typetext

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