Reconstruction of photon number conditioned states using phase randomized homodyne measurements

We experimentally demonstrate the reconstruction of a photon number conditioned state without using a photon number discriminating detector. By using only phase randomized homodyne measurements, we reconstruct up to the three photon subtracted squeezed vacuum state. The reconstructed Wigner function...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2013-05, Vol.46 (10), p.104009-1-10
Main Authors: Chrzanowski, H M, Assad, S M, Bernu, J, Hage, B, Lund, A P, Ralph, T C, Lam, P K, Symul, T
Format: Article
Language:English
Subjects:
Conditioning
Counting
Detectors
homodyne
Photons
Reconstruction
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Summary:We experimentally demonstrate the reconstruction of a photon number conditioned state without using a photon number discriminating detector. By using only phase randomized homodyne measurements, we reconstruct up to the three photon subtracted squeezed vacuum state. The reconstructed Wigner functions of these states show regions of pronounced negativity, signifying the non-classical nature of the reconstructed states. The techniques presented allow for complete characterization of the role of a conditional measurement on an ensemble of states, and might prove useful in systems where photon counting still proves technically challenging.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/46/10/104009