# 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

, Volume 12 (11) – Jul 25, 2013
15 pages

/lp/springer_journal/remote-information-concentration-via-w-w-state-reverse-of-ancilla-free-nUjAZOoo1x
Publisher
Springer US
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

### References

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

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