论文标题
超冷原子混合物中波动的非平衡动力学
Non-equilibrium dynamics of fluctuations in an ultra-cold atomic mixture
论文作者
论文摘要
我们通过研究自旋波动的动力学来研究通过自旋变性碰撞相互作用的叶气体的超冷混合物。实验实现采用$^{23} $ na和$^{7} $ li原子，这些原子是在各种初始条件下以平衡来制备的。我们在系统动力学中确定了不同初始状态的动力学方案：长期寿命的亚稳态，不稳定范围，具有强大的波动增长以及快速放松的状态接近热平衡。数据的理论建模使我们能够重建有效的电势，以表征系统的不同动力学制度。
We investigate an ultra-cold mixture of Bose gases interacting via spin-changing collisions by studying the dynamics of spin fluctuations. The experimental implementation employs $^{23}$Na and $^{7}$Li atoms, which are prepared out of equilibrium across a wide range of initial conditions. We identify three regimes in the dynamics of the system for different initial states: a long-lived metastable regime, an instability range with strong growth of fluctuations, and a fast relaxing regime approaching thermal equilibrium. Theoretical modelling of the data allows us to reconstruct effective potentials which characterize the different dynamical regimes of the system.
