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Title: Simulating Z 2 topological insulators with cold atoms in a one-dimensional optical lattice
Authors: Mei, F.
Zhu, S.-L.
Zhang, Z.-M.
Oh, C.H. 
Goldman, N.
Issue Date: 27-Jan-2012
Citation: Mei, F., Zhu, S.-L., Zhang, Z.-M., Oh, C.H., Goldman, N. (2012-01-27). Simulating Z 2 topological insulators with cold atoms in a one-dimensional optical lattice. Physical Review A - Atomic, Molecular, and Optical Physics 85 (1) : -. ScholarBank@NUS Repository.
Abstract: We propose an experimental scheme to simulate and detect the properties of time-reversal invariant topological insulators, using cold atoms trapped in one-dimensional bichromatic optical lattices. This system is described by a one-dimensional Aubry-Andre model with an additional SU(2) gauge structure, which captures the essential properties of a two-dimensional Z 2 topological insulator. We demonstrate that topologically protected edge states, with opposite spin orientations, can be pumped across the lattice by sweeping a laser phase adiabatically. This process is an elegant way to transfer topologically protected quantum states in a highly controllable environment. We discuss how density measurements could provide clear signatures of the topological phases emanating from our one-dimensional system. © 2012 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.85.013638
Appears in Collections:Staff Publications

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