Experimental test of the strongly nonclassical character of a noisy squeezed single-photon state

M. Ježek, A. Tipsmark, R. Dong, J. Fiurášek, L. Mišta, Jr., R. Filip, and U. L. Andersen
Phys. Rev. A 86, 043813 – Published 10 October 2012

Abstract

We experimentally verify the quantum non-Gaussian character of a conditionally generated noisy squeezed single-photon state with a positive Wigner function. Employing an optimized witness based on probabilities of squeezed vacuum and squeezed single-photon states, we prove that the state cannot be expressed as a mixture of Gaussian states. In our experiment, the non-Gaussian state is generated by conditional subtraction of a single photon from a squeezed vacuum state. The state is probed with a homodyne detector and the witness is determined by averaging a suitable pattern function over the measured homodyne data. Our experimental results are in good agreement with a theoretical fit obtained from a simple yet realistic model of the experimental setup.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 11 July 2012

DOI:https://doi.org/10.1103/PhysRevA.86.043813

©2012 American Physical Society

Authors & Affiliations

M. Ježek1,2, A. Tipsmark2, R. Dong2,3, J. Fiurášek1, L. Mišta, Jr.1, R. Filip1, and U. L. Andersen2

  • 1Department of Optics, Palacký University, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
  • 2Department of Physics, Technical University of Denmark, Fysikvej, DK-2800 Kgs. Lyngby, Denmark
  • 3Quantum Frequency Standards Division, National Time Service Center (NTSC), Chinese Academy of Sciences, 710600 Lintong, Shaanxi, China

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 86, Iss. 4 — October 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×