中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3739-3743.doi: 10.1088/1674-1056/17/10/035

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Generation and classification of robust remote symmetric Dicke states

高克林1, 朱燕舞2   

  1. (1)Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China; (2)Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2008-03-26 修回日期:2008-04-23 出版日期:2008-10-20 发布日期:2008-10-20

Generation and classification of robust remote symmetric Dicke states

Zhu Yan-Wu(朱燕舞)a)b) and Gao Ke-Lin(高克林)a)   

  1. a Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China; b Graduate School of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-03-26 Revised:2008-04-23 Online:2008-10-20 Published:2008-10-20

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摘要： In this paper, we present an approach to generating arbitrary symmetric Dicke states with distant trapped ions and linear optics. Distant trapped ions can be prepared in the symmetric Dicke states by using two photon-number-resolving detectors and a polarization beam splitter. The atomic symmetric Dicke states are robust against decoherence, for atoms are in a metastable level. We discuss the experimental feasibility of our scheme with current technology. Finally, we discuss the classification of arbitrary $n$-qubit symmetric Dicke states under statistical local operation and classical communication and prove the existence of $[n/2]$ inequivalent classes of genuine entanglement of $n$-qubit symmetric Dicke states.

关键词: linear optics, ion trap, symmetric Dicke states

Abstract: In this paper, we present an approach to generating arbitrary symmetric Dicke states with distant trapped ions and linear optics. Distant trapped ions can be prepared in the symmetric Dicke states by using two photon-number-resolving detectors and a polarization beam splitter. The atomic symmetric Dicke states are robust against decoherence, for atoms are in a metastable level. We discuss the experimental feasibility of our scheme with current technology. Finally, we discuss the classification of arbitrary $n$-qubit symmetric Dicke states under statistical local operation and classical communication and prove the existence of $[n/2]$ inequivalent classes of genuine entanglement of $n$-qubit symmetric Dicke states.

Key words: linear optics, ion trap, symmetric Dicke states

中图分类号:  (Atom cooling methods)

  • 37.10.De
03.65.Ud (Entanglement and quantum nonlocality) 03.67.Lx (Quantum computation architectures and implementations)