Conditional production of superpositions of coherent states with inefficient photon detection

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Title Conditional production of superpositions of coherent states with inefficient photon detection
Author Lund, Austin; Jeong, H.; Ralph, T. C.; Kim, M. S.
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2004
Place of publication Ridge, NY
Publisher American Physical Society
Abstract It is shown that a linear superposition of two macroscopically distinguishable optical coherent states can be generated using a single photon source and simple all-optical operations. Weak squeezing on a single photon, beam mixing with an auxiliary coherent state, and photon detecting with imperfect threshold detectors are enough to generate a coherent state superposition in a free propagating optical field with a large coherent amplitude (α>2) and high fidelity (F>0.99) . In contrast to all previous schemes to generate such a state, our scheme does not need photon number resolving measurements nor Kerr-type nonlinear interactions. Furthermore, it is robust to detection inefficiency and exhibits some resilience to photon production inefficiency.
Peer Reviewed Yes
Published Yes
Publisher URI http://prola.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevA.70.020101
Copyright Statement Copyright 2004 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 70
Issue Number 2
Page from 020101-1
Page to 020101-4
ISSN 1050-2947
Date Accessioned 2009-12-01
Date Available 2009-12-16T07:09:38Z
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Cross discipline
URI http://hdl.handle.net/10072/27347
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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