Dynamics and entanglement of a membrane-in-the-middle optomechanical system in the extremely-large-amplitude regime  

作　　者：Ming Gao FuChuan Lei ChunGuang Du GuiLu Long 

机构地区：[1]State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics, tsinghua University, Beiiine 100084, China [2]Tsinghua National Laboratory of Information Science and Technology, Beijing 100084, China [3]Collaborative Innovation Center of Quantum Matter, Beijing 100084, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2016年第1期45-52,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11175094 and 91221205);the National Key Basic Research Program of China(Grant No.2011CB9216002)

摘　　要：The study of optomechanical systems has attracted much attention, most of which are concentrated in the physics in the smallamplitude regime. While in this article, we focus on optomechanics in the extremely-large-amplitude regime and consider both classical and quantum dynamics. Firstly, we study classical dynamics in a membrane-in-the-middle optomechanical system in which a partially reflecting and flexible membrane is suspended inside an optical cavity. We show that the membrane can present self-sustained oscillations with limit cycles in the shape of sawtooth-edged ellipses and exhibit dynamical multistability. Then, we study the dynamics of the quantum fluctuations around the classical orbits. By using the logarithmic negativity, we calculate the evolution of the quantum entanglement between the optical cavity mode and the membrane during the mechanical oscillation. We show that there is some synchronism between the classical dynamical process and the evolution of the quantum entanglement.The study of optomechanical systems has attracted much attention, most of which are concentrated in the physics in the small- amplitude regime. While in this article, we focus on optomechanics in the extremely-large-amplitude regime and consider both classical and quantum dynamics. Firstly, we study classical dynamics in a membrane-in-the-middle optomechanical system in which a partially reflecting and flexible membrane is suspended inside an optical cavity. We show that the membrane can present self-sustained oscillations with limit cycles in the shape of sawtooth-edged ellipses and exhibit dynamical multistability. Then, we study the dynamics of the quantum fluctuations around the classical orbits. By using the logarithmic negativity, we calculate the evolution of the quantum entanglement between the optical cavity mode and the membrane during the mechanical oscillation. We show that there is some synchronism between the classical dynamical process and the evolution of the quantum entanglement.

关 键 词：optomechanics self-sustained oscillation ENTANGLEMENT membrane-in-the-middle optomechanical system MIMOS extremely-large-amplitude regime ELAR 

分 类 号：O413.1[理学—理论物理] TN2[理学—物理]