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Quantum corrections to a spin-orbit coupled Bose-Einstein Condensate
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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.
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Thermodynamics of spin-orbit coupled bosons in two dimensions from complex Langevin
A complex Langevin simulation of 2D spin-orbit coupled bosons gives a density equation of state where mean-field underestimates density and spin-orbit coupling suppresses pseudo-condensation.
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