Non-equilibrium spin dynamics in a trapped Fermi gas with effective spin-orbit interaction

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dc.creatorStanescu, Tudor D.
dc.creatorZhang, Chuanwei
dc.creatorGalitski, Victor
dc.date2007-03-19
dc.date2007-12-17
dc.date.accessioned2026-07-07T08:49:23Z
dc.date.available2026-07-07T08:49:23Z
dc.descriptionWe consider a trapped atomic system in the presence of spatially varying laser fields. The laser-atom interaction generates a pseudospin degree of freedom (referred to simply as spin) and leads to an effective spin-orbit coupling for the fermions in the trap. Reflections of the fermions from the trap boundaries provide a physical mechanism for effective momentum relaxation and non-trivial spin dynamics due to the emergent spin-orbit coupling. We explicitly consider evolution of an initially spin-polarized Fermi gas in a two-dimensional harmonic trap and derive non-equilibrium behavior of the spin polarization. It shows periodic echoes with a frequency equal to the harmonic trapping frequency. Perturbations, such as an asymmetry of the trap, lead to the suppression of the spin echo amplitudes. We discuss a possible experimental setup to observe spin dynamics and provide numerical estimates of relevant parameters.
dc.description5 pages, 4 figures; published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0703500
dc.identifierhttp://arxiv.org/abs/cond-mat/0703500
dc.identifierPhys. Rev. Lett. 99, 110403 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.110403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144277
dc.subjectOther Condensed Matter
dc.titleNon-equilibrium spin dynamics in a trapped Fermi gas with effective spin-orbit interaction
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