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Straka I, Predojević A, Huber T, et al. Quantum non-Gaussian Depth of Single-Photon States. Phys Rev Lett. 2014;113(22):223603doi: 10.1103/PhysRevLett.113.223603.
Straka, I., Predojević, A., Huber, T., Lachman, L., Butschek, L., Miková, M., Mičuda, M., Solomon, G. S., Weihs, G., Ježek, M., & Filip, R. (2014). Quantum non-Gaussian Depth of Single-Photon States. Physical review letters, 113(22), 223603. https://doi.org/10.1103/PhysRevLett.113.223603
Straka, Ivo, et al. "Quantum non-Gaussian Depth of Single-Photon States." Physical review letters vol. 113,22 (2014): 223603. doi: https://doi.org/10.1103/PhysRevLett.113.223603
Straka I, Predojević A, Huber T, Lachman L, Butschek L, Miková M, Mičuda M, Solomon GS, Weihs G, Ježek M, Filip R. Quantum non-Gaussian Depth of Single-Photon States. Phys Rev Lett. 2014 Nov 28;113(22):223603. doi: 10.1103/PhysRevLett.113.223603. Epub 2014 Nov 25. PMID: 25494072.
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Phys Rev Lett. 2014 Nov 28;113(22):223603. doi: 10.1103/PhysRevLett.113.223603. Epub 2014 Nov 25.

Quantum non-Gaussian Depth of Single-Photon States.

Physical review letters

Ivo Straka, Ana Predojević, Tobias Huber, Lukáš Lachman, Lorenz Butschek, Martina Miková, Michal Mičuda, Glenn S Solomon, Gregor Weihs, Miroslav Ježek, Radim Filip

Affiliations

  1. Department of Optics, Palacký University, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic.
  2. Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.
  3. Joint Quantum Institute, National Institute of Standards and Technology, and University of Maryland, Gaithersburg, Maryland 20849, USA.

PMID: 25494072 DOI: 10.1103/PhysRevLett.113.223603

Abstract

We introduce and experimentally explore the concept of the non-Gaussian depth of single-photon states with a positive Wigner function. The depth measures the robustness of a single-photon state against optical losses. The directly witnessed quantum non-Gaussianity withstands significant attenuation, exhibiting a depth of 18 dB, while the nonclassicality remains unchanged. Quantum non-Gaussian depth is an experimentally approachable quantity that is much more robust than the negativity of the Wigner function. Furthermore, we use it to reveal significant differences between otherwise strongly nonclassical single-photon sources.

Publication Types

Grant support