标题： 受色噪声驱动的量子相变的临界指数 显示英文标题

标题： Critical exponent of quantum phase transitions driven by colored noise

摘要： 我们证明了驱动耗散系统中的临界行为受到库特性显著影响。 我们研究了Dicke模型的开放系统实现，其中玻色腔模与由原子BEC两个运动模式构成的大自旋耦合。 腔模由高频激光驱动，并衰减至Markovian浴，而原子模式与有色库相互作用。 我们揭示软模无法描述临界行为的特征。 我们计算了超辐射相变的临界指数，并确定了它与有色库低频谱密度函数的固有关系。 我们表明有色库的有限温度不会在本质上改变这种对谱密度函数的依赖性。 显示英文摘要

摘要： We demonstrate that criticality in a driven-dissipative system is strongly influenced by the spectral properties of the reservoir. We study the open-system realization of the Dicke model, where a bosonic cavity mode couples to a large spin formed by two motional modes of an atomic Bose-Einstein condensate. The cavity mode is driven by a high frequency laser and it decays to a Markovian bath, while the atomic mode interacts with a colored reservoir. We reveal that the soft mode fails to describe the characteristics of the criticality. We calculate the critical exponent of the superradiant phase transition and identify an inherent relation to the low-frequency spectral density function of the colored bath. We show that a finite temperature of the colored reservoir does not modify qualitatively this dependence on the spectral density function.