Observation of Floquet Bands in Driven Spin-Orbit-Coupled Fermi Gases

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dc.contributor.VIAF4042455 (Zhang, C)
dc.contributor.authorHuang, L.
dc.contributor.authorPeng, P.
dc.contributor.authorLi, D.
dc.contributor.authorMeng, Z.
dc.contributor.authorChen, L.
dc.contributor.authorQu, Chunlei
dc.contributor.authorWang, P.
dc.contributor.authorZhang, Chuanwei
dc.contributor.authorZhang, J.
dc.contributor.utdAuthorQu, Chunlei
dc.contributor.utdAuthorZhang, Chuanwei
dc.date.accessioned2019-08-30T16:57:09Z
dc.date.available2019-08-30T16:57:09Z
dc.date.created2018-07-13
dc.description.abstractPeriodic driving of a quantum system can significantly alter its energy bands and even change the band topology, opening a completely new avenue for engineering novel quantum matter. Although important progress has been made recently in measuring topological properties of Floquet bands in different systems, direct experimental measurement of full Floquet band dispersions and their topology change is still demanding. Here we directly measure Floquet band dispersions in a periodically driven spin-orbit-coupled ultracold Fermi gas using spin-injection radio-frequency spectroscopy. We observe that the Dirac point originating from two-dimensional spin-orbit coupling can be manipulated to emerge at the lowest or highest two dressed bands by fast modulating Raman laser frequencies, demonstrating topological change of Floquet bands. Our work will provide a powerful tool for understanding fundamental Floquet physics as well as engineering exotic topological quantum matter.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipThis research is supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301602, 2018YFA0307601), NSFC (Grant No. 11474188, 11704234); ARO (Grant No. W911NF-17-1-0128), AFOSR (Grant No. FA9550-16-1-0387), and NSF (Grant No. PHY-1505496).
dc.identifier.bibliographicCitationHuang, L., P. Peng, D. Li, Z. Meng, et al. 2018. "Observation of Floquet bands in driven spin-orbit-coupled Fermi gases." Physical Review A 98(1): art. 013615, doi:10.1103/PhysRevA.98.013615
dc.identifier.issn2469-9926
dc.identifier.issue1
dc.identifier.urihttps://hdl.handle.net/10735.1/6812
dc.identifier.volume98
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevA.98.013615
dc.rights©2018 American Physical Society
dc.source.journalPhysical Review A
dc.source.journalPhysical Review A
dc.subjectElectron gas
dc.subjectQuantum systems
dc.subjectFloquet theory
dc.subjectRaman lasers
dc.titleObservation of Floquet Bands in Driven Spin-Orbit-Coupled Fermi Gases
dc.type.genrearticle

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