发表机构
College of Physics, Hangzhou Dianzi University; State Key Laboratory of Quantum Optics Technologies and Devices, Shanxi University; Zhejiang Key Laboratory of Quantum State Control and Optical Field Manipulation, Hangzhou Dianzi University（杭州电子科技大学物理学院; 山西大学量子光学技术与器件全国重点实验室; 杭州电子科技大学浙江省量子态调控与光场操纵重点实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出FTT三模模型，通过周期性磁通调制揭示超导量子电路中目标模式从非平衡凝聚态到平衡BEC的转变，并利用辅助模式调节实现选择性耗散，为可控耗散电路的非平衡态恢复提供新设计思路。
AI 中文摘要
传统单模模型对开放量子系统的有效衰减率无法准确描述模式间交换与环境引起的耗散，因此我们无法清晰看到目标模式的占据路径或辅助模式的瞬态参与。同时，我们也无法处理由电路结构导致的选择性耗散路径。为解决上述问题，我们采用基于磁通量子-传输子-传输子（FTT）的三模模型来描述超导量子电路中耗散谱的动力学特性。通过周期性磁通调制，我们发现目标磁通量子的模式间占据转移和环境释放路径从高占据非平衡凝聚态类状态转变为低占据平衡玻色-爱因斯坦凝聚（BEC）状态。在调节辅助模式的过程中增加目标模式的内禀损耗，我们进一步获得了额外的选择性环境耗散路径。该模型可为可控耗散超导量子电路中的非平衡态恢复提供新的设计视角。
英文摘要
The effective decay rate of traditional single mode model for an open quantum system can't accurately described the exchange between intermodes and dissipation caused by the environment,therefore we can not clearly see the occupation pathway of target mode or the transient participation of auxiliary modes.At the same time,we also can't address the selective dissipation pathways resulting from the circuit design.In order to solving above problem,we adopt fluxonium-transmon-transmon (FTT)-based three mode model to describe dynamical characteristics of dissipation spectrum in superconducting quantum circuits.In terms of periodic flux modulation,we find out the pathways of intermode occupation transfer and environmental release for the target fluxonium changes from a high occupation nonequilibrium condensate-like state to low occupation equilibrium Bose-Einstein condensation(BEC)state.Without increasing the intrinsic loss of the target mode in the process of adjusting the auxiliary mode,we furthermore obtain additional selectively engaged environmental dissipative pathway.Our model can provides a new design perspective for non-equilibrium state recovery in a controllable dissipation superconducting quantum circuit.
Comments11 pages, 9 figures
