Production of superpositions of coherent states in traveling optical fields with inefficient photon detection

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Title Production of superpositions of coherent states in traveling optical fields with inefficient photon detection
Author Jeong, H.; 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 We develop an all-optical scheme to generate superpositions of macroscopically distinguishable coherent states in traveling optical fields. It nondeterministically distills coherent-state superpositions (CSS's) with large amplitudes out of CSS's with small amplitudes using inefficient photon detection. The small CSS's required to produce CSS's with larger amplitudes are extremely well approximated by squeezed single photons. We discuss some remarkable features of this scheme: it effectively purifies mixed initial states emitted from inefficient single-photon sources and boosts negativity of Wigner functions of quantum states.
Peer Reviewed Yes
Published Yes
Publisher URI http://prola.aps.org/browse/PRA
Alternative URI http://dx.doi.org/10.1103/PhysRevA.72.013801
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 72
Issue Number 1
Page from 013801-1
Page to 013801-12
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/10072/27323
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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