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Distribution of Squeezed States through an Atmospheric Channel

Christian Peuntinger, Bettina Heim, Christian R. Müller, Christian Gabriel, Christoph Marquardt, and Gerd Leuchs
Phys. Rev. Lett. 113, 060502 – Published 4 August 2014
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Abstract

Continuous variable quantum states of light are used in quantum information protocols and quantum metrology and known to degrade with loss and added noise. We were able to show the distribution of bright polarization squeezed quantum states of light through an urban free-space channel of 1.6 km length. To measure the squeezed states in this extreme environment, we utilize polarization encoding and a postselection protocol that is taking into account classical side information stemming from the distribution of transmission values. The successful distribution of continuous variable squeezed states is accentuated by a quantum state tomography, allowing for determining the purity of the state.

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  • Received 26 February 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.060502

© 2014 American Physical Society

Authors & Affiliations

Christian Peuntinger1,2,*, Bettina Heim1,2,3, Christian R. Müller1,2, Christian Gabriel1,2, Christoph Marquardt1,2,3,†, and Gerd Leuchs1,2,3

  • 1Max Planck Institute for the Science of Light, Günther-Scharowsky-Straße 1/Building 24, 91058 Erlangen, Germany
  • 2Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg (FAU), Staudtstraße 7/B2, 91058 Erlangen, Germany
  • 3Erlangen Graduate School in Advanced Optical Technologies (SAOT), FAU, Paul-Gordan-Straße 6, 91052 Erlangen, Germany

  • *christian.peuntinger@mpl.mpg.de
  • christoph.marquardt@mpl.mpg.de

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Issue

Vol. 113, Iss. 6 — 8 August 2014

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