1209.2897 (Renyuan Liao et al.)

Ground State Properties of Spin-Orbit Coupled Bose Gases for Arbitrary
Interactions    [PDF]

Renyuan Liao, Wu-Ming Liu

We study spin-orbit coupled (SOC) Bose gases with arbitrary interspecies interaction. Besides at a critical interaction our results carry over to the recent publication [PRL 109,025301 (2012)], we identify various new features arising from the interplay of SOC and interspecies interaction, including a roton minimum in the excitation spectrum and dual effects of SOC on ground state energies depending on interspecies interactions. Counterintuitively, we find that at low interspecies interaction the SOC stabilizes the system by suppressing the quantum depletion. We show that the static structure factor is robust with respect to the SOC in the phase space where time-reversal symmetry is preserved.

View original: http://arxiv.org/abs/1209.2897