Charge Pumping of Interacting Fermion Atoms in the Synthetic Dimension
Recently it has been theoretically proposed and experimentally demonstrated that a spin-orbit coupled multicomponent gas in a 1D lattice can be viewed as a spinless gas in a synthetic 2D lattice with a magnetic flux. In this Letter we consider interaction effects in such a Fermi gas, and propose the...
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Veröffentlicht in: | Physical review letters 2015-08, Vol.115 (9), p.095302-095302, Article 095302 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Recently it has been theoretically proposed and experimentally demonstrated that a spin-orbit coupled multicomponent gas in a 1D lattice can be viewed as a spinless gas in a synthetic 2D lattice with a magnetic flux. In this Letter we consider interaction effects in such a Fermi gas, and propose these effects can be easily detected in a charge pumping experiment. Using 1/3 filling of the lowest 2D band as an example, in the strongly interacting regime, we show that the charge pumping value gradually approaches a universal fractional value for large spin components and low filling of the 1D lattice, indicating a fractional quantum Hall-type behavior, while the charge pumping value is zero if the 1D lattice filling is commensurate, indicating a Mott insulator behavior. The charge-density-wave order is also discussed. |
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ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/physrevlett.115.095302 |