Two-Photon Interference of Single Photons from Dissimilar Sources
Two-Photon Interference of Single Photons from Dissimilar Sources
复制标题
来自不同光源的单光子的双光子干涉
DOI：
10.1103/physrevapplied.18.054005
复制
发表时间：
2022-02
影响因子：
4.6
通讯作者：
C. Dangel;Jonas Schmitt;A. Bennett;K. Müller;J. Finley
中科院分区：
文献类型：
--
作者：
C. Dangel;Jonas Schmitt;A. Bennett;K. Müller;J. Finley
纠缠交换和预言是许多分布式量子信息协议的核心。对于光子，这通常涉及基于双光子干涉效应的贝尔状态测量。在这种情况下，将高速率、超稳定和纯量子源与长寿命量子存储器相结合的联合收割机特别令人感兴趣。在这里，我们开发了一个理论描述的脉冲双光子干涉的光子从不同的来源来预测二阶互相关测量的结果。这些与光子不可逆性直接相关，因此用于量化光子不可逆性。我们研究了它们对量子态寿命和频率失谐等关键系统参数的依赖性，并量化了发射时间抖动、纯失相和光谱漂移的影响。我们的研究结果表明，对于发射体1的固定寿命，对于每一个频率失谐，存在一个最佳的发射体2的寿命，导致最高的光子不可逆性。对涉及III-V族量子点、金刚石色心、2D材料和原子的不同混合组合的期望针对真实世界的系统参数进行了定量比较。我们的工作提供了一个理论基础，治疗不同的发射器，并使评估的缺陷可以容忍的混合光子量子网络。这两位作者对这项工作做出了同样的贡献。† finley@wsi.tum.de 1 ar X iv：2 20 2. 04 88 4v 1 [ qu an tph ] 1 0 Fe B 20 22
Entanglement swapping and heralding are at the heart of many protocols for distributed quantum information. For photons, this typically involves Bell state measurements based on two-photon interference effects. In this context, hybrid systems that combine high rate, ultra-stable and pure quantum sources with long-lived quantum memories are particularly interesting. Here, we develop a theoretical description of pulsed two-photon interference of photons from dissimilar sources to predict the outcomes of second-order cross-correlation measurements. These are directly related to, and hence used to quantify, photon indistinguishability. We study their dependence on critical system parameters such as quantum state lifetime and frequency detuning, and quantify the impact of emission time jitter, pure dephasing and spectral wandering. Our results show that for fixed lifetime of emitter one, for each frequency detuning there is an optimal lifetime of emitter two that leads to highest photon indistinguishability. Expectations for different hybrid combinations involving III-V quantum dots, color centers in diamond, 2D materials and atoms are quantitatively compared for real-world system parameters. Our work both provides a theoretical basis for the treatment of dissimilar emitters and enables assessment of which imperfections can be tolerated in hybrid photonic quantum networks. ∗ These two authors contributed equally to this work. † finley@wsi.tum.de 1 ar X iv :2 20 2. 04 88 4v 1 [ qu an tph ] 1 0 Fe b 20 22