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arXiv · 1705.03783

Phase diagram of a generalized off-diagonal Aubry-André model with p-wave pairing

Tong Liu·Pei Wang·Shu Chen·Gao Xianlong
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Abstract

Off-diagonal Aubry-André (AA) model has recently attracted a great deal of attention as they provide condensed matter realization of topological phases. We numerically study a generalized off-diagonal AA model with p-wave superfluid pairing in the presence of both commensurate and incommensurate hopping modulations. The phase diagram as functions of the modulation strength of incommensurate hopping and the strength of the p-wave pairing is obtained by using the multifractal analysis. We show that with the appearance of the p-wave pairing, the system exhibits mobility-edge phases and critical phases with various number of topologically protected zero-energy modes. Predicted topological nature of these exotic phases can be realized in a cold atomic system of incommensurate bichromatic optical lattice with induced p-wave superfluid pairing by using a Raman laser in proximity to a molecular Bose-Einstein condensation.

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Tong Liu, Pei Wang, Shu Chen, Gao Xianlong. 2017-05-10. Phase diagram of a generalized off-diagonal Aubry-André model with p-wave pairing. https://doi.org/10.1088/1361-6455%2Faa98d6

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