Entangling two levitated charged nanospheres through Coulomb interaction

doi:10.1088/1674-1056/ad3229

中国物理B ›› 2024, Vol. 33 ›› Issue (7): 74205-074205.doi: 10.1088/1674-1056/ad3229

Entangling two levitated charged nanospheres through Coulomb interaction

Guoyao Li(李国耀) and Zhangqi Yin(尹璋琦)†

Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2023-12-22 修回日期:2024-02-12 接受日期:2024-03-11 出版日期:2024-06-18 发布日期:2024-06-20
通讯作者: Zhangqi Yin E-mail:zqyin@bit.edu.cn
基金资助:
This research is supported by the National Natural Science Foundation of China (Grant No. 61771278) and the Beijing Institute of Technology Research Fund Program for Young Scholars.

Entangling two levitated charged nanospheres through Coulomb interaction

Guoyao Li(李国耀) and Zhangqi Yin(尹璋琦)†

Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China

Received:2023-12-22 Revised:2024-02-12 Accepted:2024-03-11 Online:2024-06-18 Published:2024-06-20
Contact: Zhangqi Yin E-mail:zqyin@bit.edu.cn
Supported by:
This research is supported by the National Natural Science Foundation of China (Grant No. 61771278) and the Beijing Institute of Technology Research Fund Program for Young Scholars.

摘要/Abstract

摘要： Limited by the thermal environment, the entanglement of a massive object is extremely difficult to generate. Based on a coherent scattering mechanism, we propose a scheme to generate the entanglement of two optically levitated nanospheres through the Coulomb interaction. Two nanospheres are charged and coupled to each other through the Coulomb interaction. In this manner, the entanglement of two nanospheres is induced either under a weak/strong optomechanical coupling regime or under an ultra-strong optomechanical coupling regime. The charges, radius and distance of the two nanospheres are taken into consideration to enhance the Coulomb interaction, thereby achieving a higher degree of entanglement in the absence of ground-state cooling. The corresponding maximum entanglement can be attained as the dynamics of the system approaches the boundary between the steady and the unsteady regimes. This provides a useful resource for both quantum-enhanced sensing and quantum information processing, as well as a new platform for studying many-body physics.

关键词: quantum entanglement, coherent scattering, Coulomb interaction

Abstract: Limited by the thermal environment, the entanglement of a massive object is extremely difficult to generate. Based on a coherent scattering mechanism, we propose a scheme to generate the entanglement of two optically levitated nanospheres through the Coulomb interaction. Two nanospheres are charged and coupled to each other through the Coulomb interaction. In this manner, the entanglement of two nanospheres is induced either under a weak/strong optomechanical coupling regime or under an ultra-strong optomechanical coupling regime. The charges, radius and distance of the two nanospheres are taken into consideration to enhance the Coulomb interaction, thereby achieving a higher degree of entanglement in the absence of ground-state cooling. The corresponding maximum entanglement can be attained as the dynamics of the system approaches the boundary between the steady and the unsteady regimes. This provides a useful resource for both quantum-enhanced sensing and quantum information processing, as well as a new platform for studying many-body physics.

Key words: quantum entanglement, coherent scattering, Coulomb interaction

中图分类号: (Cavity quantum electrodynamics; micromasers)

42.50.Pq

03.67.Mn (Entanglement measures, witnesses, and other characterizations)

Guoyao Li(李国耀) and Zhangqi Yin(尹璋琦). Entangling two levitated charged nanospheres through Coulomb interaction[J]. 中国物理B, 2024, 33(7): 74205-074205.

Guoyao Li(李国耀) and Zhangqi Yin(尹璋琦). Entangling two levitated charged nanospheres through Coulomb interaction[J]. Chin. Phys. B, 2024, 33(7): 74205-074205.

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Entangling two levitated charged nanospheres through Coulomb interaction

Entangling two levitated charged nanospheres through Coulomb interaction

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