Mathematical Physics and NanoLund, LTH, Lund University, P.O. Box 118, 22100 Lund, Sweden.
Department of Physics, Faculty of Science, Selcuk University, TR-42075 Konya, Turkey.
Phys Rev Lett. 2019 Oct 18;123(16):160405. doi: 10.1103/PhysRevLett.123.160405.
Quantum droplets may form out of a gaseous Bose-Einstein condensate, stabilized by quantum fluctuations beyond mean field. Determining the ground state of a rotating binary condensate, we show that multiple singly quantized vortices may form in these droplets at moderate angular momenta in two dimensions. Droplets carrying these precursors of an Abrikosov lattice remain self-bound for certain timescales after switching off an initial harmonic confinement. Intriguingly, we find evidence of a metastable persistent current in these new types of binary condensates. We discuss how this finding can be used to experimentally generate vortex-carrying quantum droplets.
量子液滴可能由玻色-爱因斯坦凝聚态气体形成，通过超越平均场的量子涨落稳定。在旋转双原子凝聚态的基态下，我们发现二维体系中在中等角动量下可以形成多个单量子涡旋。在关闭初始简谐约束后，携带这些阿布里科索夫晶格前体的液滴在一定时间尺度内仍然保持自束缚。有趣的是，我们在这些新型双原子凝聚体中发现了稳定持久电流的证据。我们讨论了如何利用这一发现来实验生成携带涡旋的量子液滴。
