"Spin-orbit-coupled Bose-Einstein condensates: static and dynamic properties" Yun Li

・Date: Wednesday, 12th August
・Time: 14:00-15:00
・Venue: C016, LevelC, Lab1

The recent realization of synthetic spin-orbit coupling represents an outstanding achievement in the physics of ultracold quantum gases. In this talk we review the properties of a spin-orbit-coupled Bose-Einstein condensate with equal Rashba and Dresselhaus strengths.

This system presents a rich phase diagram, which exhibits a tricritical point separating a zero-momentum phase, a spin-polarized plane-wave phase, and a stripe phase. In the stripe phase translational invariance is spontaneously broken, in analogy with supersolids. Spin-orbit coupling also strongly affects the dynamics of the system. In particular, the excitation spectrum exhibits intriguing features, including the suppression of the sound velocity, the emergence of a roton minimum in the plane-wave phase, and the appearance of a double gapless band structure in the stripe phase.