Effect of an auxiliary mode on bipartite entanglement in a dissipative three-mode optomechanical system

  • Lihui Sun
  • Feng Xia
  • Kaikai Zhang
  • Huafeng Zhang
  • Dahai Xu
Regular Article
  • 22 Downloads

Abstract

The influence of a fast damped auxiliary mode on the creation of bipartite entanglement in a dissipative three-mode optomechanical system is investigated. We show how the reduction of fluctuations of the modes and the creation of the entanglement depend on the type of the coupling between the auxiliary and the other modes. A detailed calculation of the inseparability parameter is presented for three different types of couplings possible in the system: (a) nonlinear parametric-type, (b) linear-type, and (c) linear-type coupling to one of the two modes and parametric-type coupling to the other mode. Our calculations reveal the necessity of having a parametric-type coupling in the system. We find, however, that the presence of the linear-type rather than the parametric-type coupling protects the modes from excess noise. In particular, we show that in (a)–(c) cases a strong linear-type coupling between some of the mode leads to a significant reduction of the fluctuations of the modes, and in the (b) and (c) cases the presence of a strong linear-type coupling between the auxiliary and the other modes results in an entanglement between the modes.

Graphical abstract

Keywords

Quantum Optics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Lihui Sun
    • 1
  • Feng Xia
    • 1
  • Kaikai Zhang
    • 1
  • Huafeng Zhang
    • 1
  • Dahai Xu
    • 1
  1. 1.Institute of Quantum Optics and Information Photonics, School of Physics and Optoelectronic Engineering, Yangtze UniversityJingzhouP.R. China

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