窄带光子源干涉实现量子隐形传态和多光子纠缠
Experimental Quantum Teleportation and Multi-Photon Entanglement via Interfering Narrowband Photon Sources
摘要：
在这封信中，我们报道了一种通过干涉窄带光子源实现无同步量子隐形传态和窄带三光子纠缠的方法。由于所用的单光子和纠缠光子对都是完全自主的，因此它消除了使用脉冲自发参量下转换源的长距离量子通信中对高要求同步技术的要求。实现的三光子纠缠的频率线宽为几MHz量级，符合基于原子系综的量子存储器的要求。这样的窄带多光子源在一些先进的量子通信协议和线性光量子计算中具有应用前景。
英文摘要：
In this letter, we report a realization of synchronization-free quantum teleportation and narrowband three-photon entanglement through interfering narrowband photon sources. Since both the single-photon and the entangled photon pair utilized are completely autonomous, it removes the requirement of high demanding synchronization technique in long-distance quantum communication with pulsed spontaneous parametric down-conversion sources. The frequency linewidth of the three-photon entanglement realized is on the order of several MHz, which matches the requirement of atomic ensemble based quantum memories. Such a narrowband multi-photon source will have applications in some advanced quantum communication protocols and linear optical quantum computation.
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