论文标题
由驱动的两级系统浴引起的有效量子动力学
Effective quantum dynamics induced by a driven two-level-system bath
论文作者
论文摘要
我们得出了一个Born-Markov Master方程，该方程描述了一个有损但相干驱动的两级系统（TLS）引起的耗散，并通过Jaynes-Cummings交互耦合到Bosonic System。我们分析得出所有主方程率。我们为与相同TLS的单模系统的特定情况的特定情况表征了这些速率。我们研究了系统的稳态及其外来特性，其源于驱动TLS浴的非热固定状态。这些特性包括耗散扩增，浴诱导的线性不稳定性以及相干和耗散挤压。主方程对于任意强大的TLS驾驶有效，并且可以推广以包括多级系统或其他系统浴相互作用术语等。我们的工作提供了一种研究和表征TLS诱导的破坏性的工具，这是基于超导电路，宏伟的系统或量子声学的量子技术设备中的关键限制因素。
We derive a Born-Markov master equation describing the dissipation induced by a bath of lossy but coherently driven two-level systems (TLS) coupled to a bosonic system via Jaynes-Cummings interaction. We analytically derive all the master equation rates. We characterize these rates for the particular case of a single-mode system coupled to identical TLS. We study the steady state of the system and its exotic properties stemming from the non-thermal stationary state of the driven TLS bath. These properties include dissipative amplification, bath-induced linear instability, and both coherent and dissipative squeezing. The master equation is valid for arbitrarily strong TLS driving, and it can be generalized to include multi-level systems or other system-bath interaction terms, among others. Our work provides a tool to study and characterize TLS-induced decoherence, a key limiting factor in quantum technological devices based on, for instance, superconducting circuits, magnonic systems, or quantum acoustics.
