论文标题
量子聚集的两光子步行
Quantum-Clustered Two-Photon Walks
论文作者
论文摘要
我们在离散的量子步行中演示了先前未知的两光子效应。尽管如此，两个没有相互作用的相同的玻色子仍可以保持聚集在一起，因为它们在方向可逆的四个端口的晶格上行走，用作Grover Coins；由于两光子量子干扰现象让人联想到Hong-ou-mandel效应，因此两个光子在每个步骤都沿相同的方向移动。聚集的两光振幅分为两个局部部位，一个在初始点附近振荡，另一个以孤独的方式弹出弹道而没有空间散布。但是，这两个光子总是聚集在叠加的同一部分中，从而导致潜在的纠缠运输和新型两光子干涉测量实验的机会。
We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions nonetheless can remain clustered together as they walk on a lattice of directionally-reversible optical four-ports acting as Grover coins; both photons move in the same direction at each step due to a two-photon quantum interference phenomenon reminiscent of the Hong-Ou-Mandel effect. The clustered two-photon amplitude splits into two localized parts, one oscillating near the initial point, and the other moving ballistically without spatial spread, in soliton-like fashion. But the two photons are always clustered in the same part of the superposition, leading to potential applications for transport of entanglement and opportunities for novel two-photon interferometry experiments.
