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dc.contributor.authorPolini, Marcoeng
dc.contributor.authorVignale, Giovanni, 1957-eng
dc.date.issued2007eng
dc.descriptionURL:http://link.aps.org/doi/10.1103/PhysRevLett.98.266403 DOI:10.1103/PhysRevLett.98.266403eng
dc.description.abstractLow-energy spin and charge excitations of one-dimensional interacting fermions are completely decoupled and propagate with different velocities. These modes, however, can decay due to several possible mechanisms. In this Letter we expose a new facet of spin-charge separation: not only the speeds but also the damping rates of spin and charge excitations are different. While the propagation of long-wavelength charge excitations is essentially ballistic, spin propagation is intrinsically damped and diffusive. We suggest that cold Fermi gases trapped inside a tight atomic waveguide offer the opportunity to measure the spin- drag relaxation rate that controls the broadening of a spin packet.eng
dc.description.sponsorshipThis work was supported by NSF Grant No. DMR- 0313681.eng
dc.identifier.citationPhys. Rev. Lett. 98, 266403 (2007) [4 pages]eng
dc.identifier.issn0031-9007eng
dc.identifier.urihttp://hdl.handle.net/10355/7731eng
dc.languageEnglisheng
dc.publisherAmerican Physical Societyeng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.subjectFermions in reduced dimensionseng
dc.subjectdegenerate Fermi gaseseng
dc.subjectlattice fermion modelseng
dc.subject.lcshFermionseng
dc.subject.lcshElectron gaseng
dc.titleSpin Drag and Spin-Charge Separation in Cold Fermi Gaseseng
dc.typeArticleeng


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