Sudden change of interferometric power for X-shape states

doi:10.1088/1674-1056/ad9732

中国物理B ›› 2025, Vol. 34 ›› Issue (2): 20305-020305.doi: 10.1088/1674-1056/ad9732

Sudden change of interferometric power for X-shape states

Dian Zhu(朱典)¹, Fu-Lin Zhang(张福林)^2,†, and Jing-Ling Chen(陈景灵)^1,‡

1 Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin 300071, China;
2 Department of Physics, School of Science, Tianjin University, Tianjin 300072, China

收稿日期:2024-08-26 修回日期:2024-11-13 接受日期:2024-11-26 出版日期:2025-02-15 发布日期:2025-01-15
通讯作者: Fu-Lin Zhang, Jing-Ling Chen E-mail:flzhang@tju.edu.cn;chenjl@nankai.edu.cn
基金资助:
Project supported by the National Natural Science Foundations of China (Grant Nos. 11675119, 12275136, and 12075001) and the Nankai Zhide Foundations.

Sudden change of interferometric power for X-shape states

Dian Zhu(朱典)¹, Fu-Lin Zhang(张福林)^2,†, and Jing-Ling Chen(陈景灵)^1,‡

1 Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin 300071, China;
2 Department of Physics, School of Science, Tianjin University, Tianjin 300072, China

Received:2024-08-26 Revised:2024-11-13 Accepted:2024-11-26 Online:2025-02-15 Published:2025-01-15
Contact: Fu-Lin Zhang, Jing-Ling Chen E-mail:flzhang@tju.edu.cn;chenjl@nankai.edu.cn
Supported by:
Project supported by the National Natural Science Foundations of China (Grant Nos. 11675119, 12275136, and 12075001) and the Nankai Zhide Foundations.

摘要/Abstract

摘要： Quantum interferometric power (IP), a discordlike measure, plays an important role in quantum metrology. We study the dynamics of IP for two-qubit X-shape states under different noisy environments. Our study shows that IP exhibits sudden change, and one side quantum channel is enough for the occurrence of a sudden change of IP. In particular, we show that the initial state having no sudden change of quantum discord exhibits a sudden change of IP under the dynamics of amplitude noise, but the converse is not true. Besides, we also investigate the dynamics of IP under two different kinds of composite noises. Our results also confirm that sudden change of IP occurs under such composite noises.

关键词: quantum interferometric power, quantum noise, sudden change

Abstract: Quantum interferometric power (IP), a discordlike measure, plays an important role in quantum metrology. We study the dynamics of IP for two-qubit X-shape states under different noisy environments. Our study shows that IP exhibits sudden change, and one side quantum channel is enough for the occurrence of a sudden change of IP. In particular, we show that the initial state having no sudden change of quantum discord exhibits a sudden change of IP under the dynamics of amplitude noise, but the converse is not true. Besides, we also investigate the dynamics of IP under two different kinds of composite noises. Our results also confirm that sudden change of IP occurs under such composite noises.

Key words: quantum interferometric power, quantum noise, sudden change

中图分类号: (Quantum systems with finite Hilbert space)

03.65.Aa

03.67.-a (Quantum information) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

Dian Zhu(朱典), Fu-Lin Zhang(张福林), and Jing-Ling Chen(陈景灵). Sudden change of interferometric power for X-shape states[J]. 中国物理B, 2025, 34(2): 20305-020305.

Dian Zhu(朱典), Fu-Lin Zhang(张福林), and Jing-Ling Chen(陈景灵). Sudden change of interferometric power for X-shape states[J]. Chin. Phys. B, 2025, 34(2): 20305-020305.

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