Spin-charge separation in a 1D Fermi gas with tunable interactions

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dc.citation.firstpage1305
dc.citation.issueNumber6599
dc.citation.journalTitleScience
dc.citation.lastpage1308
dc.citation.volumeNumber376
dc.contributor.authorSenaratne, Ruwan
dc.contributor.authorCavazos-Cavazos, Danyel
dc.contributor.authorWang, Sheng
dc.contributor.authorHe, Feng
dc.contributor.authorChang, Ya-Ting
dc.contributor.authorKafle, Aashish
dc.contributor.authorPu, Han
dc.contributor.authorGuan, Xi-Wen
dc.contributor.authorHulet, Randall G.
dc.date.accessioned2022-07-28T15:05:47Z
dc.date.available2022-07-28T15:05:47Z
dc.date.issued2022
dc.description.abstractUltracold atoms confined to periodic potentials have proven to be a powerful tool for quantum simulation of complex many-body systems. We confine fermions to one dimension to realize the Tomonaga-Luttinger liquid model, which describes the highly collective nature of their low-energy excitations. We use Bragg spectroscopy to directly excite either the spin or charge waves for various strengths of repulsive interaction. We observe that the velocity of the spin and charge excitations shift in opposite directions with increasing interaction, a hallmark of spin-charge separation. The excitation spectra are in quantitative agreement with the exact solution of the Yang-Gaudin model and the Tomonaga-Luttinger liquid theory. Furthermore, we identify effects of nonlinear corrections to this theory that arise from band curvature and back-scattering.
dc.identifier.citationSenaratne, Ruwan, Cavazos-Cavazos, Danyel, Wang, Sheng, et al.. "Spin-charge separation in a 1D Fermi gas with tunable interactions." <i>Science,</i> 376, no. 6599 (2022) AAAS: 1305-1308. https://doi.org/10.1126/science.abn1719.
dc.identifier.doihttps://doi.org/10.1126/science.abn1719
dc.identifier.urihttps://hdl.handle.net/1911/112920
dc.language.isoeng
dc.publisherAAAS
dc.rightsThis is an author's pre-print. The published article is copyrighted by the authors.
dc.titleSpin-charge separation in a 1D Fermi gas with tunable interactions
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpre-print
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