paper

Anderson Localization of cold atomic gases with effective spin-orbit interaction in a quasiperiodic optical lattice

arXiv:1302.5465 · doi:10.1103/PhysRevA.87.023625

Abstract

We theoretically investigate the localization properties of a spin-orbit coupled spin-1/2 particle moving in a one-dimensional quasiperiodic potential, which can be experimentally implemented using cold atoms trapped in a quasiperiodic optical lattice potential and external laser fields. We present the phase diagram in the parameter space of the disorder strength and those related to the spin-orbit coupling. The phase diagram is verified via multifractal analysis of the atomic wavefunctions and the numerical simulation of diffusion dynamics. We found that spin-orbit coupling can lead to the spectra mixing (coexistence of extended and localized states) and the appearance of mobility edges.

8 pages, 7 figures, to be published in Phys. Rev. A

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