Wednesday, July 3, 2013

1307.0002 (Sarang Gopalakrishnan et al.)

Quantum quasicrystals of spin-orbit coupled dipolar bosons    [PDF]

Sarang Gopalakrishnan, Ivar Martin, Eugene A. Demler
We study quasi-two-dimensional dipolar Bose gases in which the bosons experience a Rashba spin-orbit coupling. We show that the degenerate dispersion minimum due to the spin-orbit coupling, combined with the long-range dipolar interaction, can stabilize a number of quantum crystalline and quasicrystalline ground states. Coupling the bosons to a fermionic species can further stabilize these phases. We estimate that the crystalline and quasicrystalline phases should be detectable in realistic dipolar condensates, e.g., dysprosium, and discuss their symmetries and excitations.
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