论文标题
驱动性关键系统的淬火协议中的熵生产动力学
Entropy production dynamics in quench protocols of a driven-dissipative critical system
论文作者
论文摘要
驱动的脉动相变是目前的一项强烈研究的主题，因为量子光学设置的实验实现前景。呈现这种过渡的最范式模型是Kerr模型，该模型预测了光学双重性的现象，在该现象中，系统可以在同一驾驶条件下放松两个不同的稳态。然而，这些状态本质上是平衡的，因此具有不可逆熵的连续产生，这是热力学中的关键量词。在本文中，我们研究了Kerr模型的淬火场景中熵生产率的动力学，其中外部泵突然改变了。这是基于Husimi $ Q $功能的最近开发的形式主义来完成的，该功能尤其是针对驱动驱动和非高斯的波斯型系统量身定制的[Phys。 Rev. Res。 2，013136（2020）]。在此框架内，熵的生产可以分为两种贡献，一个可以通过驱动器和描述经典的不可逆性进行广泛，另一个是密集的，与量子波动直接相关。尤其是后者发现，对于不同亚稳态之间的淬灭，揭示了高度的非绝热性。
Driven-dissipative phase transitions are currently a topic of intense research due to the prospect of experimental realizations in quantum optical setups. The most paradigmatic model presenting such a transition is the Kerr model, which predicts the phenomenon of optical bistability, where the system may relax to two different steady-states for the same driving condition. These states, however, are inherently out-of-equilibrium and are thus characterized by the continuous production of irreversible entropy, a key quantifier in thermodynamics. In this paper we study the dynamics of the entropy production rate in a quench scenario of the Kerr model, where the external pump is abruptly changed. This is accomplished using a recently developed formalism, based on the Husimi $Q$-function, which is particularly tailored for driven-dissipative and non-Gaussian bosonic systems [Phys. Rev. Res. 2, 013136 (2020)]. Within this framework the entropy production can be split into two contributions, one being extensive with the drive and describing classical irreversibility, and the other being intensive and directly related to quantum fluctuations. The latter, in particular, is found to reveal the high degree of non-adiabaticity, for quenches between different metastable states.
