Spin-orbit coupled weakly interacting Bose-Einstein condensates in harmonic traps

Details Spin-orbit coupled weakly interacting Bose-Einstein condensates in harmonic traps Spin-orbit coupled weakly interacting Bose-Einstein condensates in harmonic traps

2011-08-22

arxiv.org/abs/1108.4233v3

Phys. Rev. Lett. 108, 010402(2012)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.108.010402

We investigate theoretically the phase diagram of a spin-orbit coupled Bose gas in two-dimensional harmonic traps. We show that discrete Landau levels develop at strong spin-orbit coupling. For a weakly interacting gas, quantum states with skyrmion lattice patterns emerge spontaneously and preserve either parity symmetry or combined parity-time-reversal symmetry. These phases can be readily observed by experimentally engineering spin-orbit coupling and interatomic interactions for a cloud of $^{87}$Rb atoms in a highly oblate trap.

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