W state generation by adding independent single photons

W state generation by adding independent single photons In this paper, we present a simple scheme for adding independent single photons to the existed W state one by one, and then the size of W state will be expanded. Only one CNOT operation and one discrimination operation are enough for expanding $$n$$ n -photon W state to $$(n+1)$$ ( n + 1 ) -photon W state, with the success probability $$(n+1)/2n$$ ( n + 1 ) / 2 n . No single photons will be detected, and no more entangled resources are necessary. If further operations are performed, the success probability can be increased as considered. Moreover, with $$m$$ m CNOT operations and one complicate discrimination process, $$m$$ m -independent single photons can be added simultaneously. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

W state generation by adding independent single photons

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Publisher
Springer US
Copyright
Copyright © 2015 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/s11128-015-1030-0
Publisher site
See Article on Publisher Site

Abstract

In this paper, we present a simple scheme for adding independent single photons to the existed W state one by one, and then the size of W state will be expanded. Only one CNOT operation and one discrimination operation are enough for expanding $$n$$ n -photon W state to $$(n+1)$$ ( n + 1 ) -photon W state, with the success probability $$(n+1)/2n$$ ( n + 1 ) / 2 n . No single photons will be detected, and no more entangled resources are necessary. If further operations are performed, the success probability can be increased as considered. Moreover, with $$m$$ m CNOT operations and one complicate discrimination process, $$m$$ m -independent single photons can be added simultaneously.

Journal

Quantum Information ProcessingSpringer Journals

Published: May 21, 2015

References

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