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arXiv 2211.06334quant-ph
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超强耦合机制下的确定性单光子源

Deterministic single-photon source in the ultrastrong coupling regime

Jie Peng, Jianing Tang, Pinghua Tang, Zhongzhou Ren, Junlong Tian, Nancy Barraza, Gabriel Alvarado Barrios, Lucas Lamata, Enrique Solano, F. Albarran-Arriagada

AI总结:

本文提出一种在超强耦合机制下工作的电路量子电动力学确定性单光子源,通过两次绝热转移实现双光子顺序发射,同时达到接近单位效率、不可区分性和纯度。

摘要:

确定性单光子源在量子信息协议中重要且普遍存在。然而,据我们所知,目前没有任何一种单光子源能在超强光-物质耦合机制下工作,且每次激发过程只能发射一个光子。我们提出了一种在电路量子电动力学中的确定性单光子源,它能在超强耦合机制下工作。在此方案中,两个量子比特在一个过程中被同时激发,两个确定性单光子可以以任意时间间隔顺序发射。这是通过沿着双量子比特Rabi和Jaynes-Cummings模型的单光子解进行两次连续的绝热转移实现的,该模型在整个耦合机制中具有恒定的本征能量。与受激拉曼绝热通道不同,系统在光子发射后会自动回到另一个周期的初始状态。我们的方案可以同时接近单位单光子效率、不可区分性和纯度。借助斯塔克位移,可以在与谐振器频率倒数成正比的时间内生成确定性单光子。

英文摘要:

Deterministic single-photon sources are important and ubiquitous in quantum information protocols. However, to the best of our knowledge, none of them work in the ultrastrong light-matter coupling regime, and each excitation process can only emit one photon. We propose a deterministic single-photon source in circuit QED which can work in the ultrastrong coupling regime. Here, two qubits are excited simultaneously in one process and two deterministic single photons can be sequentially emitted with an arbitrary time separation. This happens through two consecutive adiabatic transfers along the one-photon solutions of the two-qubit Rabi and Jaynes-Cummings model, which has constant eigenenergy in the whole coupling regime. Unlike the stimulated Raman adiabatic passage, the system goes back to the initial state of another period automatically after photon emission. Our scheme can approach unity single-photon efficiency, indistinguishability, and purity simultaneously. With the assistance of the Stark shift, a deterministic single photon can be generated within a time proportional to the inverse of the resonator frequency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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