Yi Chang-Rui, Liu Sheng, Jiao Rui-Heng, Zhang Jin-Yi, Zhang Yong-Sheng, Chen Shuai
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Anhui 230026, China.
Phys Rev Lett. 2020 Dec 31;125(26):260603. doi: 10.1103/PhysRevLett.125.260603.
The famous Kibble-Zurek mechanism offers us a significant clue to study quantum phase transitions out of equilibrium. Here, we investigate an intriguing phenomenon of a spin-orbit coupled Bose-Einstein condensate by quenching the Raman coupling strength from a high-symmetry phase (nonmagnetic phase) to a low-symmetry phase (magnetic phase). When crossing the critical point, the fluctuation of momentum distribution leads to delayed bifurcation structures. Simultaneously, the domain information emerges in momentum space. Moreover, the universal scalings of spatiotemporal dynamics are extracted from the fluctuations and domains, which manifests homogeneous and inhomogeneous Kibble-Zurek power laws at different timescales. Our work demonstrates a paradigmatic study on the inhomogeneous Kibble-Zurek mechanism.
著名的基布尔-祖雷克机制为我们研究非平衡态量子相变提供了重要线索。在此，我们通过将拉曼耦合强度从高对称相（非磁性相）猝灭到低对称相（磁性相），研究了自旋轨道耦合玻色-爱因斯坦凝聚体的一个有趣现象。当穿过临界点时，动量分布的涨落会导致延迟的分岔结构。同时，畴信息出现在动量空间中。此外，从涨落和畴中提取了时空动力学的普适标度，这在不同时间尺度上表现出均匀和非均匀的基布尔-祖雷克幂律。我们的工作展示了对非均匀基布尔-祖雷克机制的典型研究。
