Detecting Topological Phases in Cold Atoms
Name
Liu-2013-Detecting topolgical phases.pdf
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1.47 MB
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Author(s)
Liu, Xiong-Jun
Law, Kam Tuen
Ng, Tai-Kai
Lee, Patrick A.
Date Issued
September 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Liu, Xiong-Jun et al. “Detecting Topological Phases in Cold Atoms.” Physical Review Letters 111.12 (2013): n. pag. © 2013 American Physical Society
Version
Final published version
Abstract
Chern insulators are band insulators which exhibit a gap in the bulk and gapless excitations in the edge. Detection of Chern insulators is a serious challenge in cold atoms since the Hall transport measurements are technically unrealistic for neutral atoms. By establishing a natural correspondence between the time-reversal invariant topological insulator and the quantum anomalous Hall system, we show for a class of Chern insulators that the topology can be determined by only measuring Bloch eigenstates at highly symmetric points of the Brillouin zone. Furthermore, we introduce two experimental schemes, including the spin-resolved Bloch oscillation, to carry out the measurement. These schemes are highly feasible under realistic experimental conditions. Our results may provide a powerful tool to detect topological phases in cold atoms.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.120402
