论文标题
在电路QED设置中在单独的波导中传播的时频纠缠的光子对生成
Generation of time-frequency entangled photon pairs propagating in separate waveguides in circuit QED setup
论文作者
论文摘要
纠结的时间频率构成了多种量子技术景观中大量应用的重要资源。因此，用于生成纠缠光子的有效且可调的设置是现代量子技术的必要条件。在这项工作中，我们提出了一个通用腔QED设置，旨在为按需时代生成纠缠的光子对，每个光子在单独的波导中传播。我们概述了微波超导电路QED架构中该设置的潜在化身。我们得出并在数值上求解了控制系统量子状态演变的运动方程组，从而使我们能够检查光子发射动力学。使用发射光子对的联合光谱幅度的施密特分解，我们计算纠缠熵分析其对系统参数的依赖性。我们概述了提议的方案的潜在扩展，以生成多流量时频纠缠状态。
Time-frequency entangled photons constitute an important resource for a plethora of applications across the diverse quantum technology landscape. Thus, efficient and tunable setups for the generation of entangled photons are requisite for modern quantum technologies. In this work, we propose a generic cavity QED setup designed for on-demand generation of time-frequency entangled photon pairs, with each photon propagating in a separate waveguide. We outline a potential incarnation of this setup in the microwave superconducting circuit QED architecture. We derive and numerically solve the set of equations of motion governing the evolution of the quantum state of the system, allowing us to examine the photon emission dynamics. Using the Schmidt decomposition of the joint spectral amplitude of the emitted photon pair, we compute the entanglement entropy analyzing its dependence on the system parameters. We outline the potential extension of the proposed scheme for the generation of multiphoton time-frequency entangled states.
