Effect of loss on multiplexed single-photon sources
Effect of loss on multiplexed single-photon sources
复制标题
DOI：
10.1088/1367-2630/17/4/043057
复制
发表时间：
2015-04-28
影响因子：
3.3
通讯作者：
Thompson, Mark G.
中科院分区：
文献类型：
--
作者：
Bonneau, Damien;Mendoza, Gabriel J.;Thompson, Mark G.
按需单光子源是扩展许多光量子技术的关键要求。实现按需单光子源的一种很有前途的方法是使用有源光交换网络来多路复用一组预知的单光子源。然而，多路复用源的性能由于光学元件中的光子损耗和预告器探测器的非单位探测效率而降低。给出了具有损耗分量的一般多路复用单光子源的理论描述，并推导了单光子发射和多光子污染的输出几率的表达式。我们将这些表达式应用于三种特定的复用源体系结构，并考虑了它们在设计和性能方面的权衡。为了评估有损组件对近期和长期实验目标的影响，我们模拟了多路复用源在不同组件损耗量下用于多光子态的产生。我们发现，利用损耗类似于0.2-0.4分贝的开关和高效率的数字分辨探测器组成的多路复用源，能够有效地产生20-40个低多光子污染的光子态是可能的，这为解锁新的实验和技术类别提供了可能。
An on-demand single-photon source is a key requirement for scaling many optical quantum technologies. A promising approach to realize an on-demand single-photon source is to multiplex an array of heralded single-photon sources using an active optical switching network. However, the performance of multiplexed sources is degraded by photon loss in the optical components and the non-unit detection efficiency of the heralding detectors. We provide a theoretical description of a general multiplexed single-photon source with lossy components and derive expressions for the output probabilities of single-photon emission and multi-photon contamination. We apply these expressions to three specific multiplexing source architectures and consider their tradeoffs in design and performance. To assess the effect of lossy components on near-and long-term experimental goals, we simulate the multiplexed sources when used for many-photon state generation under various amounts of component loss. We find that with a multiplexed source composed of switches with similar to 0.2-0.4 dB loss and high efficiency number-resolving detectors, a single-photon source capable of efficiently producing 20-40 photon states with low multi-photon contamination is possible, offering the possibility of unlocking new classes of experiments and technologies.