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Quantum corrections to a spin-orbit coupled Bose-Einstein Condensate

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Original languageEnglish
Number of pages15
JournalPhysical Review A
Issue number2
Publication statusPublished - 22 Aug 2019
Externally publishedYes
Publication typeA1 Journal article-refereed


We study systematically the quantum corrections to a weakly interacting Bose-Einstein condensate with spin-orbit coupling. We show that quantum fluctuations, enhanced by the spin-orbit coupling, modify quantitatively the mean-field properties such as the superfluid density, spin polarizability, and sound velocity. We find that the phase boundary between the plane wave and zero momentum phases is shifted to a smaller transverse field. We also calculate the Beliaev and Landau damping rates and find that the Landau process dominates the quasiparticle decay even at low temperature.

Publication forum classification

Field of science, Statistics Finland