Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/17622
Title: 
Topological insulator and particle pumping in a one-dimensional shaken optical lattice
Authors: 
Issue Date: 
2014
Citation: 
Mei, F., You, J. B., Zhang, D. W., Yang, X. C., Fazio, R., Zhu, S. L., & Kwek, L. C. (2014). Topological insulator and particle pumping in a one-dimensional shaken optical lattice. Physical Review A, 90(6), 063638.
Abstract: 
We propose a simple method to simulate and detect topological insulators with cold atoms trapped in a
one-dimensional bichromatic optical lattice subjected to a time-periodic modulation. The tight-binding form
of this shaken system is equivalent to the periodically driven Aubry-Andre model. We demonstrate that this
model can be mapped into a two-dimensional Chern insulator model, whose energy spectrum hosts a topological
phase within an experimentally accessible parameter regime. By tuning the laser phase adiabatically, such
one-dimensional system constitutes a natural platform to realize topological particle pumping. We show that the
Chern number characterizing the topological features of this system can be measured by detecting the density
shift after one cycle of pumping.
URI: 
ISSN: 
1050-2947 (print)
1094-1622 (online)
Other Identifiers: 
10.1103/PhysRevA.90.063638
Website: 
Appears in Collections:Journal Articles

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