Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal

doi:10.1088/1674-1056/25/11/110303

中国物理B ›› 2016, Vol. 25 ›› Issue (11): 110303-110303.doi: 10.1088/1674-1056/25/11/110303

Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal

Lian-Wu Yang(杨连武), Yun-Jie Xia(夏云杰)

1 College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
2 School of Physics, Shandong University, Jinan 250100, China

收稿日期:2016-04-26 修回日期:2016-07-21 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: Yun-Jie Xia E-mail:yjxia@mail.qfnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11204156, 61178012, 11304179, and 11247240) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20133705110001).

Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal

Lian-Wu Yang(杨连武)^1,2, Yun-Jie Xia(夏云杰)¹

1 College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
2 School of Physics, Shandong University, Jinan 250100, China

Received:2016-04-26 Revised:2016-07-21 Online:2016-11-05 Published:2016-11-05
Contact: Yun-Jie Xia E-mail:yjxia@mail.qfnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11204156, 61178012, 11304179, and 11247240) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20133705110001).

摘要/Abstract

摘要： We analyze universal conditions where the l₁ norm and relative entropy of coherence are amplified and frozen under identical bit-flip channels; that is, using pre-measurements (quantum weak measurements or quantum measurement reversals) on the systems before undergoing local bit-flip channels. With the option of quantum weak measurements or quantum measurement reversals, the measurement strength and the success probability are all determined by the initial state of the quantum system.

关键词: frozen coherence, weak measurement, quantum measurement reversal

Abstract: We analyze universal conditions where the l₁ norm and relative entropy of coherence are amplified and frozen under identical bit-flip channels; that is, using pre-measurements (quantum weak measurements or quantum measurement reversals) on the systems before undergoing local bit-flip channels. With the option of quantum weak measurements or quantum measurement reversals, the measurement strength and the success probability are all determined by the initial state of the quantum system.

Key words: frozen coherence, weak measurement, quantum measurement reversal

中图分类号: (Foundations of quantum mechanics; measurement theory)

03.65.Ta

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Pp (Quantum error correction and other methods for protection against decoherence)

杨连武, 夏云杰. Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal[J]. 中国物理B, 2016, 25(11): 110303-110303.

Lian-Wu Yang(杨连武), Yun-Jie Xia(夏云杰). Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal[J]. Chin. Phys. B, 2016, 25(11): 110303-110303.

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Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal

Amplifying and freezing of quantum coherence using weak measurement and quantum measurement reversal

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