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
Hauptverfasser: Zeng, Tian-Sheng, Wang, Ce, Zhai, Hui
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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.115.095302