Pulsed squeezed vacuum measurements without homodyning

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.053812· OSTI ID:20646282

Wenger, Jerome; Tualle-Brouri, Rosa; Grangier, Philippe ^[1]; Fiurasek, Jaromir ^[2]; Cerf, Nicolas J ^[2]

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1. Laboratoire Charles Fabry de l'Institut d'Optique, CNRS UMR 8501, F-91403 Orsay (France)
2. QUIC, Ecole Polytechnique, CP 165, Universite Libre de Bruxelles, 1050 Brussels (Belgium)

Following a recent theoretical proposal [J. Fiurasek and N. J. Cerf, Phys. Rev. Lett. 93, 063601 (2004)], we experimentally implement a scheme to measure the squeezing and purity of a single-mode squeezed vacuum state without an interferometric homodyne detection. The suggested setup is based on only a tunable beam splitter and a direct single-photon detector to fully characterize the generated Gaussian states. We discuss the experimental implementation of this procedure and compare it to other reference methods. A detailed exploitation of our results highlights some practical limitations of this method. This experimental work is followed by a detailed numerical analysis to derive the conditions required for the procedure to succeed. In particular, it is found that an overall single-photon detection efficiency of about 50% is needed, which is difficult to achieve in the present experiment.

• OSTI ID: 20646282
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BEAM SPLITTING
COMPARATIVE EVALUATIONS
DETECTION
EFFICIENCY
IMPLEMENTATION
MEASURING METHODS
NUMERICAL ANALYSIS
PHOTONS
VACUUM STATES