• 文献标题:   Cooling and entanglement of multimode graphene resonators via vacuum fluctuations
  • 文献类型:   Article
  • 作  者:   RIBEIRO S, TERCAS H
  • 作者关键词:   dispersion force, optomechanic, phonons in graphene, quantum entanglement
  • 出版物名称:   PHYSICA SCRIPTA
  • ISSN:   0031-8949 EI 1402-4896
  • 通讯作者地址:   Inst Telecomunicacoes
  • 被引频次:   0
  • DOI:   10.1088/1402-4896/aa7c46
  • 出版年:   2017

▎ 摘  要

Sympathetic laser cooling of a single mode graphene membrane coupled to an atomic cloud interacting via Casimir-Polder forces has been recently proposed. Here, we extend this study to the effect of secondary graphene membrane whose frequency may be far or close to resonance. We show that if the two mechanical modes are close together, it is possible to simultaneously cool both modes. Conversely, if the two frequencies are set far apart, the secondary mode does not affect the cooling of the first one. We also study the entanglement properties of the steadystate using the logarithmic negativity. We show how stationary mechanical entanglement between two graphene sheets can be generated by means of vacuum fluctuations. Moreover, we find that, within feasible experimental parameters, large steady-state acoustomechanical entanglement, i.e. entanglement between the phononic and mechanical mode, E-N approximate to 5, can be generated.