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Chin. Phys. B, 2024, Vol. 33(5): 050306    DOI: 10.1088/1674-1056/ad2505
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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
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.
Keywords:  quantum temporal steering      frequency modulation      decoherence  
Received:  03 December 2023      Revised:  20 January 2024      Accepted manuscript online:  02 February 2024
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  03.65.Yz (Decoherence; open systems; quantum statistical methods)  
  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62375140).
Corresponding Authors:  Weiwen Cheng     E-mail:  wwcheng@njupt.edu.cn

Cite this article: 

Mengkai Wu(吴孟凯) and Weiwen Cheng(程维文) Enhancing quantum temporal steering via frequency modulation 2024 Chin. Phys. B 33 050306

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