Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.090401
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Funding
- KAKENHI from the Japan Society for the Promotion of Science [25800225]
- MEXT of Japan [22103005, 22340114]
- Grants-in-Aid for Scientific Research [22340114, 22103005, 25800225] Funding Source: KAKEN
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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 nu = 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.
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