Entanglements in a coupled cavity–array with one oscillating end-mirror  

作　　者：吴琴 肖银 张智明 

机构地区：[1]Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices(SIPSE),Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,South China Normal University [2]School of Information Engineering,Guangdong Medical University

出　　处：《Chinese Physics B》2015年第10期227-233,共7页中国物理B（英文版）

基　　金：Project supported by the Major Research Plan of the National Natural Science Foundation of China(Grant No.91121023);the National Natural Science Foundation of China(Grant Nos.61378012 and 60978009);the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20124407110009);the National Basic Research Program of China(Grant Nos.2011CBA00200 and 2013CB921804);the Program for Changjiang Scholar and Innovative Research Team in Universities,China(Grant No.IRT1243)

摘　　要：We theoretically investigate the entanglement properties in a hybrid system consisting of an optical cavity-array coupled to a mechanical resonator. We show that the steady state of the system presents bipartite continuous variable entanglement in an experimentally accessible parameter regime. The effects of the cavity-cavity coupling strength on the bipartite entanglements in the field-mirror subsystem and in the field-field subsystem are studied. We further find that the entanglement between the adjacent cavity and the movable mirror can be entirely transferred to the distant cavity and mirror by properly choosing the cavity detunings and the coupling strength in the two-cavity case. Surprisingly, such a remote macroscopic entanglement tends to be stable in the large coupling regime and persists for environment temperatures at above 25 K in the three-cavity case. Such optomechanical systems can be used for the realization of continuous variable quantum information interfaces and networks.We theoretically investigate the entanglement properties in a hybrid system consisting of an optical cavity-array coupled to a mechanical resonator. We show that the steady state of the system presents bipartite continuous variable entanglement in an experimentally accessible parameter regime. The effects of the cavity-cavity coupling strength on the bipartite entanglements in the field-mirror subsystem and in the field-field subsystem are studied. We further find that the entanglement between the adjacent cavity and the movable mirror can be entirely transferred to the distant cavity and mirror by properly choosing the cavity detunings and the coupling strength in the two-cavity case. Surprisingly, such a remote macroscopic entanglement tends to be stable in the large coupling regime and persists for environment temperatures at above 25 K in the three-cavity case. Such optomechanical systems can be used for the realization of continuous variable quantum information interfaces and networks.

关 键 词：ENTANGLEMENT coupled-cavity array optomechanical system 

分 类 号：O413.1[理学—理论物理]