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Vortices in Bose–Einstein Condensates with Random Depth Optical Lattice

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Abstract

Effects of random depth optical lattice (OL) on vortices in Bose–Einstein condensates (BECs) are studied. By numerically solving Gross–Pitaevskii equation for rotating BECs, we analyzed the property of a single vortex (slow rotating) and vortex lattice structures (fast rotating) in the presence of random depth optical lattice. It is shown that similar to speckle disorder and bichromatic optical lattice pseudorandom potential, random depth optical lattice can also localize a singe vortex. Random depth OL can melt square vortex lattice, while speckle or bichromatic OL disorder can melt triangular vortex lattice. We also show that random depth OL disorder can induce larger angular momentum.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant Nos. 11874083 and 11574028).

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Authors and Affiliations

  1. Department of Physics and Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology Beijing, Beijing, 100083, China

    Pan Hu & Qiang Gu

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  1. Pan Hu
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  2. Qiang Gu
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Correspondence to Qiang Gu.

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Hu, P., Gu, Q. Vortices in Bose–Einstein Condensates with Random Depth Optical Lattice. J Low Temp Phys 199, 1314–1323 (2020). https://doi.org/10.1007/s10909-020-02404-7

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  • DOI: https://doi.org/10.1007/s10909-020-02404-7

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