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Scheme for Realizing Deterministic Entanglement Concentration with Atoms Via Cavity QED

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Abstract

A scheme for concentrating entanglement in two partially entangled Einstein-Podolsky-Rosen (EPR) pairs using repetitious resonant interactions of the atoms with a single-mode cavity field is proposed. A maximally entangled EPR pair can be deterministically extracted with the success probability of 1.0. In the scheme, the two logical states of a qubit are represented by the two lowest levels of an atom while a higher-energy intermediate level is used to facilitate the realization of the unitary operations, and all the operations required to realize deterministic entanglement concentration can be implemented in a reasonable amount of time before decoherence sets in. The scheme might be experimentally realizable with presently available cavity QED techniques and gives a realistic means to realize entanglement concentration deterministically.

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Authors and Affiliations

  1. Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, People’s Republic of China

    Hong-Fu Wang & Shou Zhang

  2. Department of Physics, College of Science, Yanbian University, Yanji, Jilin, 133002, People’s Republic of China

    Shou Zhang

Authors
  1. Hong-Fu Wang
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  2. Shou Zhang
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Correspondence to Shou Zhang.

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Wang, HF., Zhang, S. Scheme for Realizing Deterministic Entanglement Concentration with Atoms Via Cavity QED. Int J Theor Phys 48, 1678–1687 (2009). https://doi.org/10.1007/s10773-009-9941-0

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  • DOI: https://doi.org/10.1007/s10773-009-9941-0

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