中国物理B ›› 2015, Vol. 24 ›› Issue (7): 70310-070310.doi: 10.1088/1674-1056/24/7/070310

• GENERAL • 上一篇    下一篇

Quantum state transfer between atomic ensembles trapped in separate cavities via adiabatic passage

张春玲a, 陈美锋b   

  1. a Department of Electronic and Information Engineering, Sunshine College Fuzhou University, Fuzhou 350002, China;
    b Laboratory of Quantum Optics, Department of Physics, Fuzhou University, Fuzhou 350002, China
  • 收稿日期:2014-11-14 修回日期:2014-12-12 出版日期:2015-07-05 发布日期:2015-07-05
  • 基金资助:
    Project supported by the Funding (type B) from the Fujian Education Department, China (Grant No. JB13261).

Quantum state transfer between atomic ensembles trapped in separate cavities via adiabatic passage

Zhang Chun-Ling (张春玲)a, Chen Mei-Feng (陈美锋)b   

  1. a Department of Electronic and Information Engineering, Sunshine College Fuzhou University, Fuzhou 350002, China;
    b Laboratory of Quantum Optics, Department of Physics, Fuzhou University, Fuzhou 350002, China
  • Received:2014-11-14 Revised:2014-12-12 Online:2015-07-05 Published:2015-07-05
  • Contact: Zhang Chun-Ling E-mail:mzhangchunling@163.com
  • Supported by:
    Project supported by the Funding (type B) from the Fujian Education Department, China (Grant No. JB13261).

摘要: We propose a new approach for quantum state transfer (QST) between atomic ensembles separately trapped in two distant cavities connected by an optical fiber via adiabatic passage. The three-level Λ-type atoms in each ensemble dispersively interact with the nonresonant classical field and cavity mode. By choosing appropriate parameters of the system, the effective Hamiltonian describes two atomic ensembles interacting with “the same cavity mode” and has a dark state. Consequently, the QST between atomic ensembles can be implemented via adiabatic passage. Numerical calculations show that the scheme is robust against moderate fluctuations of the experimental parameters. In addition, the effect of decoherence can be suppressed effectively. The idea provides a scalable way to an atomic-ensemble-based quantum network, which may be reachable with currently available technology.

关键词: quantum state transfer, atomic ensemble, cavity QED

Abstract: We propose a new approach for quantum state transfer (QST) between atomic ensembles separately trapped in two distant cavities connected by an optical fiber via adiabatic passage. The three-level Λ-type atoms in each ensemble dispersively interact with the nonresonant classical field and cavity mode. By choosing appropriate parameters of the system, the effective Hamiltonian describes two atomic ensembles interacting with “the same cavity mode” and has a dark state. Consequently, the QST between atomic ensembles can be implemented via adiabatic passage. Numerical calculations show that the scheme is robust against moderate fluctuations of the experimental parameters. In addition, the effect of decoherence can be suppressed effectively. The idea provides a scalable way to an atomic-ensemble-based quantum network, which may be reachable with currently available technology.

Key words: quantum state transfer, atomic ensemble, cavity QED

中图分类号:  (Entanglement production and manipulation)

  • 03.67.Bg
42.50.Dv (Quantum state engineering and measurements) 42.50.Pq (Cavity quantum electrodynamics; micromasers)