Protecting quantum states from decoherence of finite temperature using weak measurement

被引：120

作者：

Wang, Shu-Chao ^{[1
,2
]}

Yu, Zong-Wen ^{[3
]}

Zou, Wen-Jie ^{[1
,2
]}

Wang, Xiang-Bin ^{[1
,2
,4
]}

机构：

[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[2] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China

[3] Data Commun Sci & Technol Res Inst, Beijing 100191, Peoples R China

[4] Shandong Acad Informat & Commun Technol, Jinan 250101, Peoples R China

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 02期

关键词：

EXPERIMENTAL ENTANGLEMENT DISTILLATION; ERROR-CORRECTING CODES; PURIFICATION; SUPPRESSION;

D O I：

10.1103/PhysRevA.89.022318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Exposed in the nonzero temperature environment, a quantum system can both lose and gain excitations by interacting with the environment. In this work, we show how to optimally protect quantum states and quantum entanglement in such a situation based on measurement reversal from weak measurement. In particular, we present explicit formulas of protection. We find that this scheme can circumvent the entanglement sudden death in certain conditions.

引用

页数：8

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