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Efficient and controlled symmetric and asymmetric Bell-state transfers in a dissipative Jaynes-Cummings model |
| Qi-Cheng Wu(吴奇成)1,†,‡, Yu-Liang Fang(方玉亮)1,†, Yan-Hui Zhou(周彦辉)1, Jun-Long Zhao(赵军龙)1, Yi-Hao Kang(康逸豪)2, Qi-Ping Su(苏奇平)2, and Chui-Ping Yang(杨垂平)2,§ |
1 Quantum Information Research Center and Jiangxi Province Key Laboratory of Applied Optical Technology, Shangrao Normal University, Shangrao 334001, China;
2 School of Physics, Hangzhou Normal University, Hangzhou 311121, China |
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Abstract Realizing efficient and controlled state transfers is necessary for implementing a wide range of classical and quantum information protocols. Recent studies have demonstrated that both asymmetric and symmetric state transfers can be achieved by encircling an exceptional point (EP) in non-Hermitian (NH) systems. However, the application of this phenomenon has been restricted to scenarios where an EP exists in single-qubit systems and is associated with a specific type of dissipation. In this work, we demonstrate efficient and controlled symmetric and asymmetric Bell-state transfers by modulating system parameters within a Jaynes-Cummings model while accounting for atomic spontaneous emission and cavity decay. The effective suppression of nonadiabatic transitions enables a symmetric exchange of Bell states irrespective of the encircling direction. Furthermore, we report a counterintuitive finding: the presence of an EP is not indispensable for implementing asymmetric state transfers in NH systems. We achieve perfect asymmetric Bell-state transfers even in the absence of an EP by dynamically orbiting around an approximate EP. Our work presents an approach to effectively and reliably manipulate entangled states with both symmetric and asymmetric characteristics, through dissipation engineering in NH systems.
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Received: 09 September 2025
Revised: 30 September 2025
Accepted manuscript online: 09 October 2025
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PACS:
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03.67.-a
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(Quantum information)
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42.50.Dv
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(Quantum state engineering and measurements)
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74.40.Kb
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(Quantum critical phenomena)
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| Fund: This project was supported by the National Key Research and Development Program of China (Grant No. 2024YFA1408900), the National Natural Science Foundation of China (Grant Nos. 12264040, 12374333, and U21A20436), the Jiangxi Natural Science Foundation (Grant Nos. 20232BCJ23022 and 20252BAC240119), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0301705), and the Jiangxi Province Key Laboratory of Applied Optical Technology (Grant No. 2024SSY03051). |
Corresponding Authors:
Qi-Cheng Wu, Chui-Ping Yang
E-mail: wuqi.cheng@163.com;yangcp@hznu.edu.cn
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Cite this article:
Qi-Cheng Wu(吴奇成), Yu-Liang Fang(方玉亮), Yan-Hui Zhou(周彦辉), Jun-Long Zhao(赵军龙), Yi-Hao Kang(康逸豪), Qi-Ping Su(苏奇平), and Chui-Ping Yang(杨垂平) Efficient and controlled symmetric and asymmetric Bell-state transfers in a dissipative Jaynes-Cummings model 2026 Chin. Phys. B 35 010304
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