通过相位匹配过程产生纠缠：线宽内的不同Bell态
Entanglement generation via phase-matched processes: different Bell states within the linewidth
摘要：
它示出，理论和实验，在任何类型的II自发参量下转换（SPDC）相位匹配，消相干的单重态贝尔总是存在于自然带宽内，可以通过适当的频谱选择过滤掉。代替频率选择，可以在色散光纤的输出处执行双光子时间振幅的时间选择。概述了量子通信的应用。
英文摘要：
It is shown, theoretically and experimentally, that at any type-II spontaneous parametric down-conversion (SPDC) phase matching, the decoherence-free singlet Bell state is always present within the natural bandwidth and can be filtered out by a proper spectral selection. Instead of the frequency selection, one can perform time selection of the two-photon time amplitude at the output of a dispersive fibre. Applications to quantum communication are outlined.
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。
