Dynamics and control of entangled electron-photon states in nanophotonic systems with time-variable parameters
Dynamics and control of entangled electron-photon states in nanophotonic systems with time-variable parameters
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DOI：
10.1103/physreva.103.013708
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发表时间：
2021-01-07
影响因子：
2.9
通讯作者：
Belyanin, Alexey
中科院分区：
文献类型：
--
作者：
Chen, Qianfan;Wang, Yongrui;Belyanin, Alexey
我们研究具有时变参数的强耦合纳米光子系统的动力学。针对广泛的开放量子系统获得了近似解析解，这些系统包括与腔中的多模量子化电磁场强耦合的两级费米子发射体，具有时变腔谐振或电子跃迁能量。费米子和光子子系统与其耗散库的耦合包含在随机演化方程方法中，这相当于主方程形式中的 Lindblad 近似。在参数调制速率和频率调制幅度远小于光学跃迁频率的近似下，得到了量子态和可观观量的解析解。同时，它们对于广义拉比振荡频率可以是任意的，这决定了相干动力学。因此，我们的解析理论可以应用于参数的任意调制，比拉比频率慢或快，以完全控制量子态。特别是，我们演示了用于打开和关闭费米子和光子自由度之间的纠缠、量子态之间交换以及由于调制引起的透明度而使费米子量子位与腔场解耦的协议。
We study the dynamics of strongly coupled nanophotonic systems with time-variable parameters. The approximate analytic solutions are obtained for a broad class of open quantum systems including a two-level fermion emitter strongly coupled to a multimode quantized electromagnetic field in a cavity with time-varying cavity resonances or the electron transition energy. The coupling of the fermion and photon subsystems to their dissipative reservoirs is included within the stochastic equation of evolution approach, which is equivalent to the Lindblad approximation in the master equation formalism. The analytic solutions for the quantum states and the observables are obtained under the approximation that the rate of parameter modulation and the amplitude of the frequency modulation are much smaller than the optical transition frequencies. At the same time, they can be arbitrary with respect to the generalized Rabi oscillation frequency, which determines the coherent dynamics. Therefore, our analytic theory can be applied to an arbitrary modulation of the parameters, both slower and faster than the Rabi frequency, for complete control of the quantum state. In particular, we demonstrate protocols for switching on and off the entanglement between the fermionic and photonic degrees of freedom, swapping between the quantum states, and the decoupling of the fermionic qubit from the cavity field due to modulation-induced transparency.