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Proceedings Paper

Experimental generation of optical "Schrödinger cats" from photon number states
Author(s): Alexei Ourjoumtsev; Hyunseok Jeong; Rosa Tualle-Brouri; Philippe Grangier
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Paper Abstract

A "Schrödinger cat" state of free-propagating light can be defined as a quantum superposition of well separated coherent states. 1, 2 We demonstrated, theoretically and experimentally, a protocol which allows to generate arbitrarily large squeezed Schrödinger cat states, using a homodyne detection and photon number states as resources. We implemented this protocol experimentally with light pulses containing two photons, producing a squeezed Schrödinger cat state with a negative Wigner function. This state clearly presents several quantum phase-space interference fringes between the "dead" and "alive" components, and it is large enough to become useful for experimental tests of quantum theory and quantum information processing.

Paper Details

Date Published: 10 September 2007
PDF: 9 pages
Proc. SPIE 6780, Quantum Communications Realized, 678010 (10 September 2007); doi: 10.1117/12.736622
Show Author Affiliations
Alexei Ourjoumtsev, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud, CNRS (France)
Hyunseok Jeong, Univ. of Queensland (Australia)
Rosa Tualle-Brouri, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud, CNRS (France)
Philippe Grangier, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud, CNRS (France)


Published in SPIE Proceedings Vol. 6780:
Quantum Communications Realized
Yasuhiko Arakawa; Masahide Sasaki; Hideyuki Sotobayashi, Editor(s)

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