Remote information concentration via $$W$$ W state: reverse of ancilla-free phase-covariant telecloning

Remote information concentration via $$W$$ W state: reverse of ancilla-free phase-covariant... In this paper, we investigate generalized remote information concentration as the reverse process of ancilla-free phase-covariant telecloning (AFPCT) which is different from the reverse process of optimal universal telecloning. It is shown that the quantum information via $$1\rightarrow 2$$ 1 → 2 AEPCT procedure can be remotely concentrated back to a single qubit with a certain probability by utilizing (non-)maximally entangled $$W$$ W states as quantum channels. Our protocols are the generalization of Wang’s scheme (Open J Microphys 3:18–21. doi: 10.4236/ojm.2013.31004 , 2013). And von Neumann measure and positive operator-valued measurement are performed in the maximal and non-maximal cases respectively. Relatively the former, the dimension of measurement space in the latter is greatly reduced. It makes the physical realization easier and suitable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Remote information concentration via $$W$$ W state: reverse of ancilla-free phase-covariant telecloning

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Publisher
Springer Journals
Copyright
Copyright © 2013 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-013-0613-x
Publisher site
See Article on Publisher Site

Abstract

In this paper, we investigate generalized remote information concentration as the reverse process of ancilla-free phase-covariant telecloning (AFPCT) which is different from the reverse process of optimal universal telecloning. It is shown that the quantum information via $$1\rightarrow 2$$ 1 → 2 AEPCT procedure can be remotely concentrated back to a single qubit with a certain probability by utilizing (non-)maximally entangled $$W$$ W states as quantum channels. Our protocols are the generalization of Wang’s scheme (Open J Microphys 3:18–21. doi: 10.4236/ojm.2013.31004 , 2013). And von Neumann measure and positive operator-valued measurement are performed in the maximal and non-maximal cases respectively. Relatively the former, the dimension of measurement space in the latter is greatly reduced. It makes the physical realization easier and suitable.

Journal

Quantum Information ProcessingSpringer Journals

Published: Jul 25, 2013

References

  • Joint remote preparation of an arbitrary three-qubit state
    Luo, MX; Chen, XB; Ma, SY; Niu, XX; Yang, YX

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