报告题目：Multi-component condensates in toroidally trapped geometries
报 告 人：Angela White（Okinawa Institute of Science and Technology）
报告时间：2017年11 月 30 日（周四）10:00
报告地点：校本部G309
邀请人：张永平
报告摘要：
Superfluid properties of rotating two-component Bose–Einstein condensates change as a function of the interaction energy through the phase transition from miscibility to immiscibility. Azimuthally phase-separated states in toroidally trapped condensates have been shown to exhibit classical solid-body rotation despite the quantum nature of superfluid flow. Furthermore, breaking rotational symmetry breaks conservation of angular momentum and can lead to sustained oscillating superflow between two different rotation directions. In the absence of rotation, introducing Rashba spin-orbit coupling leads to necklace states in the immiscible regime. These necklace states composed of azimuthally phase-separated density lobes, mimic the density profiles expected for many-component condensates in the immiscible regime, and are a unique manifestation of the well-know stripy phase arising in spin-orbit coupled condensates. In the miscible regime, persistent current states are found, with a unit winding difference between each component. We show that both the winding numbers in the persistent current states and the number of density lobes composing the necklace-like states are highly-tuneable and depend on the spin-orbit coupling strength
