Coherent-state linear optical quantum computing gates using simplified diagonal superposition resource states

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Title Coherent-state linear optical quantum computing gates using simplified diagonal superposition resource states
Author Lund, A. P.; Ralph, T. C.
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2005
Place of publication Ridge, NY
Publisher American Physical Society
Abstract In this paper we explore the possibility of fundamental tests for coherent-state optical quantum computing gates [T. C. Ralph et al., Phys. Rev. A 68, 042319 (2003)] using sophisticated but not unrealistic quantum states. The major resource required in these gates is a state diagonal to the basis states. We use the recent observation that a squeezed single-photon state [S(r)∣1⟩] approximates well an odd superposition of coherent states (∣α⟩−∣−α⟩) to address the diagonal resource problem. The approximation only holds for relatively small α , and hence these gates cannot be used in a scalable scheme. We explore the effects on fidelities and probabilities in teleportation and a rotated Hadamard gate.
Peer Reviewed Yes
Published Yes
Publisher URI http://prola.aps.org/browse/PRA
Alternative URI http://dx.doi.org/10.1103/PhysRevA.71.032305
Copyright Statement Copyright 2005 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 71
Issue Number 3
Page from 032305-1
Page to 032305-9
ISSN 1050-2947
Date Accessioned 2009-12-01
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Cross discipline
URI http://hdl.handle.net/10072/27336
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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