Dynamical symmetries and crossovers in a three-spin system with collective dissipation
Dynamical symmetries and crossovers in a three-spin system with collective dissipation
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DOI：
10.1088/1367-2630/17/1/015010
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发表时间：
2014-09
影响因子：
3.3
通讯作者：
Simon Pigeon;André Xuereb;Igor Lesanovsky;J. P. Garrahan;G. D. Chiara;Mauro Paternostro
中科院分区：
文献类型：
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作者：
Simon Pigeon;André Xuereb;Igor Lesanovsky;J. P. Garrahan;G. D. Chiara;Mauro Paternostro
本文研究了自旋为1/2的相互作用粒子在集体阻尼作用下的非平衡动力学。该模型是接近的情况下，可以在混合电/光机械设置工程。利用大偏差理论，我们发现了系统动力学的加拉沃蒂-科恩对称性，以及两个具有不同活动水平的动力学相共存的证据。我们表明，额外的阻尼过程可以平滑这种行为。我们的分析结果支持Monte Carlo模拟，揭示了不同的动力学阶段的轨迹的性质。
We consider the non-equilibrium dynamics of a simple system consisting of interacting spin-1/2 particles subjected to a collective damping. The model is close to situations that can be engineered in hybrid electro/opto-mechanical settings. Making use of large-deviation theory, we find a Gallavotti–Cohen symmetry in the dynamics of the system as well as evidence for the coexistence of two dynamical phases with different activity levels. We show that additional damping processes smooth out this behavior. Our analytical results are backed up by Monte Carlo simulations that reveal the nature of the trajectories contributing to the different dynamical phases.