File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Superfluid density of a spin-orbit-coupled Bose gas

TitleSuperfluid density of a spin-orbit-coupled Bose gas
Authors
Issue Date2016
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/pra/
Citation
Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2016, v. 94, p. 033635:1-5 How to Cite?
AbstractWe discuss the superfluid properties of a uniform, weakly interacting Bose-Einstein condensed gas with spin-orbit coupling, realized recently in experiments. We find a finite normal fluid density ρ n at zero temperature which turns out to be a function of the Raman coupling. In particular, the entire fluid becomes normal at the transition point from the zero momentum to the plane wave phase, even though the condensate fraction remains finite. We emphasize the crucial role played by the breaking of Galilean invariance and by the gapped branch of the elementary excitations whose contribution to various sum rules is discussed explicitly. Our predictions for the superfluid density are successfully compared with the available experimental results based on the measurement of the sound velocities.
Persistent Identifierhttp://hdl.handle.net/10722/234774
ISSN
2015 Impact Factor: 2.765

 

DC FieldValueLanguage
dc.contributor.authorZhang, Y-
dc.contributor.authorYu, Z-
dc.contributor.authorNg, T-
dc.contributor.authorZhang, S-
dc.contributor.authorPitaevskii, L-
dc.contributor.authorStringari, S-
dc.date.accessioned2016-10-14T13:49:10Z-
dc.date.available2016-10-14T13:49:10Z-
dc.date.issued2016-
dc.identifier.citationPhysical Review A: covering atomic, molecular, and optical physics and quantum information, 2016, v. 94, p. 033635:1-5-
dc.identifier.issn2469-9926-
dc.identifier.urihttp://hdl.handle.net/10722/234774-
dc.description.abstractWe discuss the superfluid properties of a uniform, weakly interacting Bose-Einstein condensed gas with spin-orbit coupling, realized recently in experiments. We find a finite normal fluid density ρ n at zero temperature which turns out to be a function of the Raman coupling. In particular, the entire fluid becomes normal at the transition point from the zero momentum to the plane wave phase, even though the condensate fraction remains finite. We emphasize the crucial role played by the breaking of Galilean invariance and by the gapped branch of the elementary excitations whose contribution to various sum rules is discussed explicitly. Our predictions for the superfluid density are successfully compared with the available experimental results based on the measurement of the sound velocities.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/pra/-
dc.relation.ispartofPhysical Review A: covering atomic, molecular, and optical physics and quantum information-
dc.rightsPhysical Review A: covering atomic, molecular, and optical physics and quantum information. Copyright © American Physical Society.-
dc.titleSuperfluid density of a spin-orbit-coupled Bose gas-
dc.typeArticle-
dc.identifier.emailZhang, Y: yicaizha@hku.hk-
dc.identifier.emailZhang, S: shizhong@hku.hk-
dc.identifier.authorityZhang, S=rp01661-
dc.identifier.doi10.1103/PhysRevA.94.033635-
dc.identifier.hkuros269981-
dc.identifier.volume94-
dc.identifier.spage033635:1-
dc.identifier.epage5-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats