Enhancing quantum temporal steering via frequency modulation

doi:10.1088/1674-1056/ad2505

中国物理B ›› 2024, Vol. 33 ›› Issue (5): 50306-050306.doi: 10.1088/1674-1056/ad2505

Enhancing quantum temporal steering via frequency modulation

Mengkai Wu(吴孟凯) and Weiwen Cheng(程维文)†

Institute of Signal Processing & Transmission, Nanjing University of Posts and Telecommunication, Nanjing 210003, China

收稿日期:2023-12-03 修回日期:2024-01-20 接受日期:2024-02-02 出版日期:2024-05-20 发布日期:2024-05-20
通讯作者: Weiwen Cheng E-mail:wwcheng@njupt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 62375140).

Enhancing quantum temporal steering via frequency modulation

Mengkai Wu(吴孟凯) and Weiwen Cheng(程维文)†

Institute of Signal Processing & Transmission, Nanjing University of Posts and Telecommunication, Nanjing 210003, China

Received:2023-12-03 Revised:2024-01-20 Accepted:2024-02-02 Online:2024-05-20 Published:2024-05-20
Contact: Weiwen Cheng E-mail:wwcheng@njupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 62375140).

摘要/Abstract

摘要： Various strategies have been proposed to harness and protect space-like quantum correlations in different models under decoherence. However, little attention has been given to temporal-like correlations, such as quantum temporal steering (TS), in this context. In this work, we investigate TS in a frequency-modulated two-level system coupled to a zero-temperature reservoir in both the weak and strong coupling regimes. We analyze the impact of various frequency-modulated parameters on the behavior of TS and non-Markovian. The results demonstrate that appropriate frequency-modulated parameters can enhance the TS of the two-level system, regardless of whether the system is experiencing Markovian or non-Markovian dynamics. Furthermore, a suitable ratio between modulation strength and frequency ( i.e., all zeroes of the $0$th Bessel function $J_{0}({\delta}/{\varOmega})$) can significantly enhance TS in the strong coupling regime. These findings indicate that efficient and effective manipulation of quantum TS can be achieved through a frequency-modulated approach.

关键词: quantum temporal steering, frequency modulation, decoherence

Abstract: Various strategies have been proposed to harness and protect space-like quantum correlations in different models under decoherence. However, little attention has been given to temporal-like correlations, such as quantum temporal steering (TS), in this context. In this work, we investigate TS in a frequency-modulated two-level system coupled to a zero-temperature reservoir in both the weak and strong coupling regimes. We analyze the impact of various frequency-modulated parameters on the behavior of TS and non-Markovian. The results demonstrate that appropriate frequency-modulated parameters can enhance the TS of the two-level system, regardless of whether the system is experiencing Markovian or non-Markovian dynamics. Furthermore, a suitable ratio between modulation strength and frequency ( i.e., all zeroes of the $0$th Bessel function $J_{0}({\delta}/{\varOmega})$) can significantly enhance TS in the strong coupling regime. These findings indicate that efficient and effective manipulation of quantum TS can be achieved through a frequency-modulated approach.

Key words: quantum temporal steering, frequency modulation, decoherence

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

Mengkai Wu(吴孟凯) and Weiwen Cheng(程维文). Enhancing quantum temporal steering via frequency modulation[J]. 中国物理B, 2024, 33(5): 50306-050306.

Mengkai Wu(吴孟凯) and Weiwen Cheng(程维文). Enhancing quantum temporal steering via frequency modulation[J]. Chin. Phys. B, 2024, 33(5): 50306-050306.

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Enhancing quantum temporal steering via frequency modulation

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