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- W4293463669 abstract "We study a helical superfluid, a nonzero-momentum condensate in a frustrated bosonic model. At mean-field Bogoliubov level, such a novel state exhibits smectic fluctuation that are qualitatively stronger than that of a conventional superfluid. We develop a phase diagram and compute a variety of its physical properties, including the spectrum, structure factor, condensate depletion, momentum distribution, all of which are qualitatively distinct from that of a conventional superfluid. Interplay of fluctuations, interaction and lattice effects gives rise to the phenomenon of order-by-disorder, leading to a crossover from the smectic superfluid regime to the anisotropic XY superfluid phase. We complement the microscopic lattice analysis with a field theoretic description for such a helical superfluid, which we derive from microscopics and justify on general symmetry grounds, reassuringly finding full consistency. Possible experimental realizations are discussed." @default.
- W4293463669 created "2022-08-29" @default.
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- W4293463669 date "2022-08-29" @default.
- W4293463669 modified "2023-09-25" @default.
- W4293463669 title "Helical superfluid in a frustrated honeycomb Bose-Hubbard model" @default.
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- W4293463669 doi "https://doi.org/10.1103/physreva.106.023321" @default.
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