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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 |
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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 0th 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.
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Received: 03 December 2023
Revised: 20 January 2024
Accepted manuscript online:
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PACS:
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62375140). |
Corresponding Authors:
Weiwen Cheng,E-mail:wwcheng@njupt.edu.cn
E-mail: wwcheng@njupt.edu.cn
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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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