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- W2602489790 abstract "We study the time evolution of a Bose-Einstein condensate with a vortex on it when it is released from a trap and expands freely in a spatially uncorrelated disordered media. As customary in such cases, we perform the evolution over different disorder realizations and average over the disorder to obtain the quantities of interest. The propagation of noninteracting quantum systems in disordered media is strongly linked to Anderson localization which can be understood as formation of islands of constant phase due to coherent backscattering. We find that the vortex superfluid localizes in such media and, moreover, the vortex is resilient to disorder effects. This is a single-particle effect. In the presence of interactions, no matter how small they are, the vortex rapidly decays into phase discontinuities although localization is still present. The study of dispersion of a bosonic condensate with vorticity in a disordered media bears similarities with the stability of topological excitations in two-dimensional $p$-wave fermionic superfluids where the ground state is a Majorana mode that arises in the form of a vortex in the order parameter." @default.
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- W2602489790 date "2017-03-24" @default.
- W2602489790 modified "2023-10-17" @default.
- W2602489790 title "Vortex stability in Bose-Einstein condensates in the presence of disorder" @default.
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- W2602489790 doi "https://doi.org/10.1103/physreva.95.033626" @default.
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