General hyperentanglement concentration for photon systems assisted by quantum-dot spins inside optical microcavities.
General hyperentanglement concentration for photon systems assisted by quantum-dot spins inside optical microcavities.
复制标题
DOI：
10.1364/oe.22.006547
复制
发表时间：
2014-03
期刊：
影响因子：
3.8
通讯作者：
B. Ren;G. Long
中科院分区：
文献类型：
--
作者：
B. Ren;G. Long
超纠缠在量子信息处理中是一种很有前途的资源，特别是在提高长距离量子通信信道容量方面。利用单侧光学微腔中量子点自旋的光学特性，提出了一种一般的超纠缠浓缩方案（hyper-ECP），用于处理非局域部分超纠缠Bell态，该态随双光子系统的偏振态和空间模自由度之间的相互关系衰减，而这在其他超纠缠浓缩方案中是没有考虑的.我们表明，我们的超ECP的成功概率大大增加了超ECP过程的迭代。我们的超ECP可以直接推广到从任意部分超纠缠的GHZ类态中提取非局域最大超纠缠N光子GHZ态。
Hyperentanglement is a promising resource in quantum information processing, especially for increasing the channel capacity of long-distance quantum communication. Here we present a general hyper-entanglement concentration protocol (hyper-ECP) for nonlocal partially hyperentangled Bell states that decay with the interrelationship between the polarization and the spatial-mode degrees of freedom of two-photon systems, which is not taken into account in other hyper-ECPs, resorting to the optical property of the quantum-dot spins inside one-side optical microcavities. We show that the success probability of our hyper-ECP is largely increased by iteration of the hyper-ECP process. Our hyper-ECP can be straightforwardly generalized to distill nonlocal maximally hyperentangled N-photon Greenberger-Horne-Zeilinger (GHZ) states from arbitrary partially hyperentangled GHZ-class states.