物理学报Issue(16)：1-17,17.DOI:10.7498/aps.64.160303
光子两自由度超并行量子计算与超纠缠态操控∗
Hyp er-parallel photonic quantum computation and manipulation on hyp erentangled states
摘要
Abstract
Photon system is a promising candidate for quantum information processing, and it can be used to achieve some important tasks with the interaction between a photon and an atom (or a artificial atom), such as the transmission of secret information, the storage of quantum states, and parallel quantum computing. Several degrees of freedom (DOFs) of a photon system can be used to carry information in the realization of quantum information processing, such as the polarization, spatial-mode, orbit-angular-momentum, time-bin, and frequency DOFs. A hyperparallel quantum com-puter can implement the quantum operations on several DOFs of a quantum system simultaneously, which reduces the operation time and the resources consumed in quantum information processing. The hyperparallel quantum operations are more robust against the photonic dissipation noise than the quantum computing in one DOF of a photon system. Hyperentanglement, defined as the entanglement in several DOFs of a quantum system, can improve the channel capacity and the security of long-distance quantum communication, and it can also be conductive to completing some important tasks in quantum communication. Hyperentangled Bell-state analysis is used to completely distinguish the 16 hyper-entangled Bell states, which is very useful in high-capacity quantum communication protocols and quantum repeaters. In order to depress the effect of noises in quantum channel, hyperentanglement concentration and hyperentanglement purification are required to improve the entanglement of the quantum systems in long-distance quantum communication, which is also very useful in high-capacity quantum repeaters. Hyperentanglement concentration is used to distill several nonlocal photon systems in a maximally hyperentangled state from those in a partially hyperentangled pure state, and hyperentanglement purification is used to distill several nonlocal photon systems in a high-fidelity hyperentangled state from those in a mixed hyperentangled state with less entanglement. In this reviewing article, we review some new applications of photon systems with multiple DOFs in quantum information processing, including hyperparallel photonic quantum computation, hyperentangled-Bell-state analysis, hyperentanglement concentration, and hyperentanglement purification.关键词
超并行量子计算/超纠缠态分析/超纠缠浓缩/超纠缠纯化Key words
hyperparallel quantum computation/hyperentangled-state analysis/hyperentanglement concentration/hyperentanglement purification引用本文复制引用
任宝藏,邓富国..光子两自由度超并行量子计算与超纠缠态操控∗[J].物理学报,2015,(16):1-17,17.基金项目
国家自然科学基金(批准号11474026)资助的课题.@@@@* Project supported by the National Natural Science Foundation of China (Grant No.11474026) （批准号11474026）
