Kinetic Constraints, Hierarchical Relaxation, and Onset of Glassiness in Strongly Interacting and Dissipative Rydberg Gases
Kinetic Constraints, Hierarchical Relaxation, and Onset of Glassiness in Strongly Interacting and Dissipative Rydberg Gases
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DOI：
10.1103/physrevlett.111.215305
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发表时间：
2013-11-20
影响因子：
8.6
通讯作者：
Garrahan, Juan P.
中科院分区：
文献类型：
--
作者：
Lesanovsky, Igor;Garrahan, Juan P.
我们表明，在强退相的极限激光驱动的里德堡气体的动力学描述的主方程与明显的动力学约束。系统的平衡态是不相关的，但动力学中的约束导致空间相关的集体弛豫，让人想起玻璃。我们研究和量化的演变向平衡在一个和两个维度，并分析如何玻璃化的程度和弛豫时间的里德伯原子之间的相互作用强度控制。我们还发现，里德伯激发的自发衰变会导致玻璃弛豫的中断，使系统进入高度相关的非平衡稳态。这里提出的结果，这是在原则上也适用于其他系统，如极性分子和原子与大磁偶极矩，表明冷原子和分子系综的集体行为可以类似于软凝聚态系统中发现的。
We show that the dynamics of a laser driven Rydberg gas in the limit of strong dephasing is described by a master equation with manifest kinetic constraints. The equilibrium state of the system is uncorrelated but the constraints in the dynamics lead to spatially correlated collective relaxation reminiscent of glasses. We study and quantify the evolution towards equilibrium in one and two dimensions, and analyze how the degree of glassiness and the relaxation time are controlled by the interaction strength between Rydberg atoms. We also find that spontaneous decay of Rydberg excitations leads to an interruption of glassy relaxation that takes the system to a highly correlated nonequilibrium stationary state. The results presented here, which are in principle also applicable to other systems such as polar molecules and atoms with large magnetic dipole moments, show that the collective behavior of cold atomic and molecular ensembles can be similar to that found in soft condensed-matter systems.