Robust mechanical entanglement in an atom-assisted hybrid optomechanical system

被引：0
作者：
Yuan Chen
Ai-Xi Chen
机构：
[1] Zhejiang Sci-Tech University,School of Mechanical Engineering and Automation
[2] Zhejiang Sci-Tech University,Department of Physics
[3] East China Jiaotong University,Department of Applied Physics
来源：
Quantum Information Processing | / 21卷
关键词：
Optomechanical system; Quantum entanglement; Atomic ensemble;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We theoretically explore the bipartite robust steady-state entanglement between two charged nanomechanical oscillators in an atom-assisted hybrid optomechanical system. The logarithmic negativity is adopted to measure entanglement. We find that the mechanical entanglement induced by Coulomb interaction could only survive at ultralow temperature of a few tens of mK in case of bare cavity. However, by adding the atomic degrees of freedom, the entanglement properties could be effectively modified including a further enhanced degree and broadened range of entanglement. In addition, the enhanced entanglement becomes more robust against thermal noise. This robustness is more evident when appropriately increasing the laser power. Compared to the case of no atoms, the critical temperature is raised by about two orders of magnitude.
引用
收藏
相关论文
共 255 条
[11]  
Weinstein AJ(2013)Engineering of nonclassical motional states in optomechanical systems Phys. Rev. A 88 747-73
[12]  
Mavalvala N(2006)Self-cooling of a micromirror by radiation pressure Nature 444 1520-573
[13]  
Taylor MA(2006)Radiation pressure cooling of a micromechanical oscillator using dynamical backaction Phys. Rev. Lett. 97 34004-1457
[14]  
Janousek J(2008)Resolved-sideband cooling of a micromechanical oscillator Nat. Phys. 4 69-485
[15]  
Daria V(2011)Optomechanical sideband cooling of a micromechanical oscillator close to the quantum ground state Phys. Rev. A 83 569-1630
[16]  
Knittel J(2009)Cavity-assisted squeezing of a mechanical oscillator Phys. Rev. A 79 72-2104
[17]  
Hage B(2011)Parametric generation of quadrature squeezing of mirrors in cavity optomechanics Phys. Rev. A 83 1456-17989
[18]  
Bachor HA(2016)Strong mechanical squeezing and its detection Phys. Rev. A 93 482-undefined
[19]  
Bowen WP(2007)Optomechanical entanglement between a movable mirror and a cavity field Phys. Rev. Lett. 98 1625-undefined
[20]  
Poot M(2008)Emergence of atom-light-mirror entanglement inside an optical cavity Phys. Rev. A 77 2099-undefined
12345678910