The quench dynamics of a system involving two competing orders is investigated using a Ginzburg-Landau theory with relaxational dynamics. We consider the scenario where a pump rapidly heats the system to a high temperature, after which the system cools down to its equilibrium temperature. We study the evolution of the order parameter amplitude and fluctuations in the resulting time dependent free energy landscape. Exponentially growing thermal fluctuations dominate the dynamics. The system typically evolves into the phase associated with the faster-relaxing order parameter, even if it is not the global free energy minimum. This theory offers a natural explanation for the widespread experimental observation that metastable states may be induced by laser induced collapse of a dominant equilibrium order parameter.

中文翻译：

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在具有竞争顺序的系统中瞬态陷入亚稳态

使用带有松弛动力学的Ginzburg-Landau理论研究了涉及两个竞争订单的系统的失超动力学。我们考虑了一种情况，在这种情况下，泵将系统快速加热到高温，然后系统冷却到其平衡温度。我们研究了随时间变化的自由能格局中阶跃参数振幅和波动的演变。呈指数增长的热波动支配着动力学。该系统通常演变为与快速放松阶数参数关联的阶段，即使它不是全局自由能最小值也是如此。该理论为广泛的实验观察提供了自然的解释，即亚稳态可能是由激光引起的平衡平衡阶参数的崩溃而引起的。