利用弱交叉科尔效应实现多光子任意高维空间纠缠态的确定性制备

提出两种实现多光子高维空间纠缠态的制备方案.首先给出一种基于后验选择技术的实现方案,此方案以一定的概率实现.然后以基于弱交叉科尔效应的控制路径(C-path)门为基础,给出任意双光子任意维度的空间纠缠态的制备方案,并将此方案推广到任意多光子任意维度的空间纠缠态的制备.这一制备方案的最大优点在于可以确定性的得到纠缠态,并且不需要复杂的后验选择技术,可以很方便的应用于量子信息过程,同时该方案在目前的实验条件下是可行的.

Nearly-deterministic generation of spatial entangled qudits with weak cross-Kerr nonlinearity

A linear optical experimental scheme for generation of spatial entangled qudits is proposed, which is based on the post-selection technique and is realized with some certain probability. In order to do it deterministically, the scheme based on the C-path gate which works with weak cross-Kerr nonlinearity is proposed. This new scheme is suitable for the generation of spatial entangled qudits with any photons and any dimensions. Since the generation is deterministic without post-selection technique, the entangled qudits can be used in the quantum information process without any limits. In addition, this scheme is feasible for current experimental technology.