Integer quantum hall state in two-component bose gases in a synthetic magnetic field

Shunsuke Furukawa, Masahito Ueda

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Abstract

We study two-component (or pseudospin-1/2) Bose gases in a strong synthetic magnetic field. Using exact diagonalization, we show that a bosonic analog of an integer quantum Hall state with no intrinsic topological order appears at the total filling factor ν=1+1 when the strengths of intracomponent and intercomponent interactions are comparable with each other. This provides a prime example of a symmetry-protected topological phase in a controlled setting of quantum gases. The real-space entanglement spectrum of this state is found to be comprised of counterpropagating chiral modes consistent with the edge theory derived from an effective Chern-Simons theory.

Original languageEnglish
Article number090401
JournalPhysical review letters
Volume111
Issue number9
DOIs
Publication statusPublished - 2013 Aug 26
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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