Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark.
Phys Rev Lett. 2018 Aug 17;121(7):073604. doi: 10.1103/PhysRevLett.121.073604.
We consider a quasi-two-dimensional atomic Bose-Einstein condensate interacting with a near-resonant laser field that is backreflected onto the condensate by a planar mirror. We show that this single-mirror optical feedback leads to an unusual type of effective interaction between the ultracold atoms giving rise to a rich spectrum of ground states. In particular, we find that it can cause the spontaneous contraction of the quasi-two-dimensional condensate to form a self-bound one-dimensional chain of mesoscopic quantum droplets, and demonstrate that the observation of this exotic effect is within reach of current experiments.
我们考虑了一个准二维原子玻色-爱因斯坦凝聚体与一个近共振激光场的相互作用，该激光场通过平面反射镜被反射回凝聚体。我们表明，这种单镜光学反馈导致了超冷原子之间一种不寻常类型的有效相互作用，从而产生了丰富的基态谱。特别是，我们发现它可以导致准二维凝聚体的自发收缩，形成自束缚的一维链状介观量子液滴，并证明这种奇异效应的观察是当前实验可以达到的。
