Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Heikkinen, M.O.J. Törmä, P. 2016-09-02T09:36:52Z 2011-05-25
dc.identifier.citation Heikkinen , M O J & Törmä , P 2011 , ' Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state ' PHYSICAL REVIEW A , vol 83 , no. 5 , 053630 , pp. 1-12 . DOI: 10.1103/PhysRevA.83.053630 en
dc.identifier.issn 1050-2947
dc.identifier.issn 1094-1622
dc.identifier.other PURE UUID: 9dd6bd7a-4dd1-4e73-aeca-5da7283c050a
dc.identifier.other PURE ITEMURL:
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dc.description.abstract We consider the density response of a spin-imbalanced ultracold Fermi gas in an optical lattice in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. We calculate the collective mode spectrum of the system in the generalized random-phase approximation and find that, although the collective modes are damped even at zero temperature, the damping is weak enough to have well-defined collective modes. We calculate the speed of sound in the gas and show that it is anisotropic due to the anisotropy of the FFLO pairing, which implies an experimental signature for the FFLO state. en
dc.format.extent 12
dc.format.extent 1-12
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW A en
dc.relation.ispartofseries Volume 83, issue 5 en
dc.rights openAccess en
dc.subject.other 114 Physical sciences en
dc.subject.other 221 Nanotechnology en
dc.subject.other 214 Mechanical engineering en
dc.subject.other 218 Environmental engineering en
dc.title Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Physics
dc.subject.keyword Collective modes
dc.subject.keyword Quantum gases
dc.subject.keyword Superfluidity
dc.subject.keyword 114 Physical sciences
dc.subject.keyword 221 Nanotechnology
dc.subject.keyword 214 Mechanical engineering
dc.subject.keyword 218 Environmental engineering
dc.identifier.urn URN:NBN:fi:aalto-201609023267
dc.identifier.doi 10.1103/PhysRevA.83.053630
dc.type.version publishedVersion

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