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Tools for detecting entanglement between different degrees of freedom in quadrature squeezed cylindrically polarized modes

  • C. Gabriel
  • A. Aiello
  • S. Berg-Johansen
  • Ch. Marquardt
  • G. Leuchs
Regular Article
Part of the following topical collections:
  1. Topical issue: High Dimensional Quantum Entanglement

Abstract

Quadrature squeezed cylindrically polarized modes contain entanglement not only in the polarization and spatial electric field variables but also between these two degrees of freedom [C. Gabriel et al., Phys. Rev. Lett. 106, 060502 (2011)]. In this paper we present tools to generate and detect this entanglement. Experimentally we demonstrate the generation of quadrature squeezing in cylindrically polarized modes by mode transforming a squeezed Gaussian mode. Specifically, −1.2 dB ± 0.1 dB of amplitude squeezing are achieved in the radially and azimuthally polarized mode. Furthermore, theoretically it is shown how the entanglement contained within these modes can be measured and how strong the quantum correlations are, depending on the measurement scheme.

Keywords

Topical issue: High Dimensional Quantum Entanglement. Guest editors: Sonja Franke-Arnold, Alessandra Gatti and Nicolas Treps 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • C. Gabriel
    • 1
    • 2
  • A. Aiello
    • 1
    • 2
  • S. Berg-Johansen
    • 1
    • 2
  • Ch. Marquardt
    • 1
    • 2
  • G. Leuchs
    • 1
    • 2
  1. 1.Max Planck Institute for the Science of LightErlangenGermany
  2. 2.Institute of Optics, Information and PhotonicsUniversity Erlangen-NurembergErlangenGermany

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