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第 37 卷 第 1 期, pp.13-21  (2017) [ 9页 ]

量子纠缠纯化与浓缩研究进展

曹聪
1. 北京邮电大学,信息光子学与光通信国家重点实验室,北京100876;2. 北京邮电大学民族教育学院,北京100876

王铁军
1. 北京邮电大学,信息光子学与光通信国家重点实验室,北京100876;3. 北京邮电大学理学院,北京100876

王川
1. 北京邮电大学,信息光子学与光通信国家重点实验室,北京100876;3. 北京邮电大学理学院,北京100876

2017/06/07 发布

高保真的量子纠缠是量子信息科学中最重要的物理资源之一, 特别是在量子通信中。然而,在实际的传输和存储过程中,纠缠的量子系统将不可避免地遭受信道噪声和环境的影响,导致纠缠的量子系统出现退相干。纠缠纯化和纠缠浓缩就是两个用来克服退相干问题的量子技术,纠缠纯化是从混合纠缠态中提取高保真最大纠缠态的过程,而纠缠浓缩是从非最大纠缠纯态中提取最大纠缠态的过程。本文重点介绍一些重要的纠缠纯化和纠缠浓缩方案,以及他们的物理原理。
High-fidelity quantum entanglement is one of the most important physical resources in quantum information science, especially in quantum communications. However, in a practical transmission or the process for storing an entangled quantum system, it inevitably suffers from channel noise and its environment. The noise will make the entangled quantum system decoherent. Entanglement purification and entanglement concentration are two important quantum techniques for depressing the decoherence of the entanglement. Entanglement purification is used to extract some high-fidelity maximally entangled states from an ensemble in a mixed state, where entanglement concentration is used to distill some maximally entangled states from an ensemble in a less-entangled pure state. This article focuses on the introduction of some important entanglement purification schemes and entanglement concentration schemes, as well as the physical principles of these schemes.

全文: [PDF]
中图分类号: O469
关键词: 量子纠缠,纠缠纯化,纠缠浓缩,人工原子,超纠缠
quantum entanglement; entanglement purification; entanglement concentration; artificial atom; hyper entanglement