Distilling perfect GHZ states from two copies of non-GHZ-diagonal mixed states

doi:http://dx.doi.org/10.1016/j.optcom.2016.12.002

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	Distilling perfect GHZ states from two copies of non-GHZ-diagonal mixed states
	Tang, SQ; Zhang, DY; Wang, XW (reprint author), Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.; Yuan, JB; Wang, XW
刊名	OPTICS COMMUNICATIONS
	2017
卷号	392 页码:185-189
关键词	Entanglement Purification Non-ghz-diagonal States Non-asymptotic Way Perfect Output States
DOI	http://dx.doi.org/10.1016/j.optcom.2016.12.002
英文摘要	It has been shown that a nearly pure Greenberger-Horne-Zeilinger (GHZ) state could be distilled from a large (even infinite) number of GHZ-diagonal states that can be obtained by depolarizing general multipartite mixed states (non-GHZ-diagonal states) through sequences of (probabilistic) local operations and classical communications. We here demonstrate that perfect GHZ states can be extracted, with certain probabilities, from two copies of non-GHZ-diagonal mixed states when some conditions are satisfied. This result implies that it is not necessary to depolarize these entangled mixed states to the GHZ-diagonal type, and that they are better than GHZ-diagonal states for distillation of pure GHZ states. We find a wide class of multipartite entangled mixed states that fulfill the requirements. Moreover, we display that the obtained result can be applied to practical noisy environments, e.g., amplitude-damping channels. Our findings provide an important complementarity to conventional GHZ-state distillation protocols (designed for GHZ-diagonal states) in theory, as well as having practical applications.
学科主题	Optics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22051]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Wang, XW (reprint author), Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
推荐引用方式 GB/T 7714	Tang, SQ,Zhang, DY,Wang, XW ,et al. Distilling perfect GHZ states from two copies of non-GHZ-diagonal mixed states[J]. OPTICS COMMUNICATIONS,2017,392:185-189.
APA	Tang, SQ,Zhang, DY,Wang, XW ,Yuan, JB,&Wang, XW.(2017).Distilling perfect GHZ states from two copies of non-GHZ-diagonal mixed states.OPTICS COMMUNICATIONS,392,185-189.
MLA	Tang, SQ,et al."Distilling perfect GHZ states from two copies of non-GHZ-diagonal mixed states".OPTICS COMMUNICATIONS 392(2017):185-189.