Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence

doi:10.1088/1674-1056/abff2a

中国物理B ›› 2021, Vol. 30 ›› Issue (7): 70307-070307.doi: 10.1088/1674-1056/abff2a

所属专题： SPECIAL TOPIC — Quantum computation and quantum simulation

Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence

Bao-Min Li(李保民)^1,2, Ming-Liang Hu(胡明亮)¹, and Heng Fan(范桁)^1,2,3,†

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Songshan Lake Materials Laboratory, Dongguan 523808, China

收稿日期:2021-03-18 修回日期:2021-04-14 接受日期:2021-05-08 出版日期:2021-06-22 发布日期:2021-06-26
通讯作者: Heng Fan E-mail:hfan@iphy.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11774406 and 11934018), the National Key Research and Develepment Program of China (Grant Nos. 2016YFA0302104 and 2016YFA0300600), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000), and the Research Program of Beijing Academy of Quantum Information Sciences (Grant No. Y18G07).

Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence

Bao-Min Li(李保民)^1,2, Ming-Liang Hu(胡明亮)¹, and Heng Fan(范桁)^1,2,3,†

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Songshan Lake Materials Laboratory, Dongguan 523808, China

Received:2021-03-18 Revised:2021-04-14 Accepted:2021-05-08 Online:2021-06-22 Published:2021-06-26
Contact: Heng Fan E-mail:hfan@iphy.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11774406 and 11934018), the National Key Research and Develepment Program of China (Grant Nos. 2016YFA0302104 and 2016YFA0300600), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000), and the Research Program of Beijing Academy of Quantum Information Sciences (Grant No. Y18G07).

摘要/Abstract

摘要： We investigate the nonlocal advantage of quantum coherence (NAQC) and entanglement for two spins coupled via the Heisenberg interaction and under the intrinsic decoherence. Solutions of this decoherence model for the initial spin-1/2 and spin-1 maximally entangled states are obtained, based on which we calculate the NAQC and entanglement. In the weak region of magnetic field, the NAQC behaves as a damped oscillation with the time evolves, while the entanglement decays exponentially (behaves as a damped oscillation) for the spin-1/2 (spin-1) case. Moreover, the decay of both the NAQC and entanglement can be suppressed significantly by tuning the magnetic field and anisotropy of the spin interaction to some decoherence-rate-determined optimal values.

关键词: quantum coherence, quantum entanglement, intrinsic decoherence

Abstract: We investigate the nonlocal advantage of quantum coherence (NAQC) and entanglement for two spins coupled via the Heisenberg interaction and under the intrinsic decoherence. Solutions of this decoherence model for the initial spin-1/2 and spin-1 maximally entangled states are obtained, based on which we calculate the NAQC and entanglement. In the weak region of magnetic field, the NAQC behaves as a damped oscillation with the time evolves, while the entanglement decays exponentially (behaves as a damped oscillation) for the spin-1/2 (spin-1) case. Moreover, the decay of both the NAQC and entanglement can be suppressed significantly by tuning the magnetic field and anisotropy of the spin interaction to some decoherence-rate-determined optimal values.

Key words: quantum coherence, quantum entanglement, intrinsic decoherence

中图分类号: (Decoherence; open systems; quantum statistical methods)

03.65.Yz

03.65.Ud (Entanglement and quantum nonlocality) 75.10.Pq (Spin chain models) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)

Bao-Min Li(李保民), Ming-Liang Hu(胡明亮), and Heng Fan(范桁). Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence[J]. 中国物理B, 2021, 30(7): 70307-070307.

Bao-Min Li(李保民), Ming-Liang Hu(胡明亮), and Heng Fan(范桁). Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence[J]. Chin. Phys. B, 2021, 30(7): 70307-070307.

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Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence

Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence

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