AI 中文总结
研究电流偏置约瑟夫森结中源于反常耗散的新相位扩散机制，通过特定电路设置实现，发现低温下反常耗散影响显著，可增强量子逃逸过程，这类电路可用于检测相关物理过程，还提供了设计非线性系统耗散动力学的通用框架。
AI 中文摘要
从理论上探索了电流偏置约瑟夫森结中的一种新的相位扩散机制，它源于将结嵌入具有反常耗散的电路环境中。这是通过在结旁放置一个与电容器串联的电阻来实现的，这样电磁涨落就有效地耦合到结的电荷上。这导致了丰富的约瑟夫森动力学，特别是对于结从零电压状态的切换。将其建模为一个虚拟相粒子从亚稳态阱中的逃逸过程，详细研究表明，在低温下当量子隧穿主导热激活时，反常耗散有强烈影响。作为一种表现，发现了一种机制，对于实际电路参数，量子逃逸过程会显著增强，随后是一个短电压脉冲并以高概率重新俘获。这类电路可用于检测微波光子或耗散量子退火过程。此外，该分析为利用反常环境在非线性系统中设计耗散动力学提供了一个通用框架。
英文摘要
A new phase diffusive regime in a current biased Josephson junction is theoretically explored which originates from embedding the junction in a circuit environment with anomalous dissipation. This is realized by placing parallel to the junction a resistor in series with a capacitor such that electromagnetic fluctuations effectively couple also to the charge of the junction. This leads to rich Josephson dynamics, in particular for the switching of the junction out of a zero voltage state. Modelled as the escape process of a fictitious phase-particle out of a metastable well, a detailed study reveals that anomalous dissipation has a strong impact at low temperatures when quantum tunneling dominates against thermal activation. As a manifestation, a regime is found, where for realistic circuit parameters the quantum escape process is substantially enhanced, followed by a short voltage pulse and re-trapping with high probability. This class of circuits may be leveraged for detecting microwave photons or dissipative quantum annealing processes. In addition, the analysis provides a general framework for engineering dissipative dynamics in nonlinear systems using anomalous environments.
