Detecting Topological Phases in Cold Atoms
Author(s)Liu, Xiong-Jun; Law, Kam Tuen; Ng, Tai-Kai; Lee, Patrick A.
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review Letters
American Physical Society
Liu, Xiong-Jun et al. “Detecting Topological Phases in Cold Atoms.” Physical Review Letters 111.12 (2013): n. pag. © 2013 American Physical Society
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