Entangling two levitated charged nanospheres through Coulomb interaction  

作　　者：李国耀 尹璋琦 Guoyao Li;Zhangqi Yin(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,China40)

机构地区：[1]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

出　　处：《Chinese Physics B》2024年第7期352-359,共8页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61771278);the Beijing Institute of Technology Research Fund Program for Young Scholars。

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 

分 类 号：O413[理学—理论物理]