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Chin. Phys. B, 2015, Vol. 24(7): 070310    DOI: 10.1088/1674-1056/24/7/070310
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Quantum state transfer between atomic ensembles trapped in separate cavities via adiabatic passage

Zhang Chun-Linga, Chen Mei-Fengb
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
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.
Keywords:  quantum state transfer      atomic ensemble      cavity QED  
Received:  14 November 2014      Revised:  12 December 2014      Published:  05 July 2015
PACS:  03.67.Bg (Entanglement production and manipulation)  
  42.50.Dv (Quantum state engineering and measurements)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
Fund: Project supported by the Funding (type B) from the Fujian Education Department, China (Grant No. JB13261).
Corresponding Authors:  Zhang Chun-Ling     E-mail:  mzhangchunling@163.com

Cite this article: 

Zhang Chun-Ling, Chen Mei-Feng Quantum state transfer between atomic ensembles trapped in separate cavities via adiabatic passage 2015 Chin. Phys. B 24 070310

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