论文标题
激光驱动的玻色子凝结物中的自结合的液滴簇
Self-bound droplet clusters in laser-driven Bose-Einstein condensates
论文作者
论文摘要
我们研究了二维Bose-Einstein冷凝物，该冷凝物是通过反射镜进行光学驱动的，形成了单个光学反馈回路。这引起了与高度振荡行为的一种特殊类型的长期原子相互作用，我们在这里展示了如何通过其他光学元素和外部磁场来控制潜在相互作用势的符号。这种额外的可调节性大大富含系统的行为，并带来令人惊讶的凝结物新接地状态。特别是，我们发现具有各种晶格结构的量子液滴的自结界晶体的出现，从简单且熟悉的三角形阵列到具有完全断裂的旋转对称性的复杂超晶格结构和晶体。这包括由少量的量子液滴以及扩展的晶体结构组成的介观簇。重要的是，这种有序状态完全是自我结合和稳定的，没有任何外部内部内部限制，与其他具有远距离原子相互作用的量子气体没有对应。
We investigate a two-dimensional Bose-Einstein condensate that is optically driven via a retro-reflecting mirror, forming a single optical feedback loop. This induces a peculiar type of long-range atomic interaction with highly oscillatory behavior, and we show here how the sign of the underlying interaction potential can be controlled by additional optical elements and external fields. This additional tunability enriches the behavior of the system substantially, and gives rise to a surprising range of new ground states of the condensate. In particular, we find the emergence of self-bound crystals of quantum droplets with various lattice structures, from simple and familiar triangular arrays to complex superlattice structures and crystals with entirely broken rotational symmetry. This includes mesoscopic clusters composed of small numbers of quantum droplets as well as extended crystalline structures. Importantly, such ordered states are entirely self-bound and stable without any external in-plane confinement, having no counterpart to other quantum-gas settings with long-range atomic interactions.
