Integer quantum Hall state in two-component Bose gases in a synthetic magnetic field

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 a...

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Bibliographic Details
Published in:Physical review letters 2013-08, Vol.111 (9), p.090401-090401, Article 090401
Main Authors: Furukawa, Shunsuke, Ueda, Masahito
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.111.090401