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arXiv · 1002.0194

Ground-state and dynamic properties of hard-core bosons in one-dimensional incommensurate optical lattices with harmonic trap

Xiaoming Cai·Shu Chen·Yupeng Wang
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Abstract

We study properties of the strongly repulsive Bose gas on one-dimensional incommensurate optical lattices with a harmonic trap, which can be deal with by using the exact numerical method through the Bose-Fermi mapping. We first exploit the phase transition of the hard-core bosons in the optical lattices from superfluid-to-Bose-glass phase as the strength of the incommensurate potential increases. Then we study the dynamical properties of the system after suddenly switching off the harmonic trap. We calculate the one-particle density matrices, momentum distributions, the natural orbitals and their occupations for both the static and dynamic systems. Our results indicate that the Bose-glass phase and superfluid phase display quite different properties and expansion dynamics.

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Xiaoming Cai, Shu Chen, Yupeng Wang. 2010-03-02. Ground-state and dynamic properties of hard-core bosons in one-dimensional incommensurate optical lattices with harmonic trap. https://doi.org/10.1103/physreva.81.053629

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