Collective modes in a bilayer dipolar fermi gas and the dissipationless drag effect

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buir.contributor.authorTanatar, Bilal
buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119
dc.citation.epage637en_US
dc.citation.issueNumber5-6en_US
dc.citation.spage632en_US
dc.citation.volumeNumber171en_US
dc.contributor.authorTanatar, Bilalen_US
dc.date.accessioned2016-02-08T09:38:21Z
dc.date.available2016-02-08T09:38:21Z
dc.date.issued2013en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe consider the collective modes of a bilayer dipolar Fermi system in which the particles interact via long range (∼1/r 3) interaction. Assuming that each layer has a background flow which varies little and that the dynamics of the superfluid near T=0 is the same as that of a normal fluid, we obtain the dispersion relations for the collective modes in the presence of background flow. Decomposing the background flow into two parts, the center-of-mass flow and counterflow, we focus on the properties of the counterflow. We first find an estimate of the change in the zero-point energy ΔE ZP due to counterflow for a unit area of bilayer. Combining this with the free energy F of the system and taking the partial derivatives with respect to background velocities in the layers, we determine the current densities which reveal the fact that current in one layer does not only depend on the velocity in the same layer but also on the velocity of the other layer. This is the drag effect and we calculate the drag coefficient.en_US
dc.identifier.doi10.1007/s10909-012-0823-0en_US
dc.identifier.eissn1573-7357
dc.identifier.issn0022-2291
dc.identifier.urihttp://hdl.handle.net/11693/20941
dc.language.isoEnglishen_US
dc.publisherSpringeren_US
dc.relation.isversionofhttp://dx.doi.org/10.1007/s10909-012-0823-0en_US
dc.source.titleJournal of Low Temperature Physicsen_US
dc.subjectBilayer dipolar Fermi gasen_US
dc.subjectCollective modesen_US
dc.subjectDrag effecten_US
dc.subjectBackground flowen_US
dc.subjectCenter-of-massen_US
dc.subjectCollective modesen_US
dc.subjectDispersion relationsen_US
dc.subjectDrag effectsen_US
dc.subjectFermi gasen_US
dc.subjectPartial derivativesen_US
dc.subjectZero-point energiesen_US
dc.subjectDispersionsen_US
dc.subjectElectron gasen_US
dc.subjectFermionsen_US
dc.subjectQuantum chemistryen_US
dc.subjectDragen_US
dc.titleCollective modes in a bilayer dipolar fermi gas and the dissipationless drag effecten_US
dc.typeArticleen_US

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