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Stokes-operator-squeezed continuous-variable polarization states

Journal Article · · Physical Review. A
 [1]; ; ; ;  [1];  [2]
  1. Department of Physics, Faculty of Science, Australian National University, Canberra ACT 0200 (Australia)
  2. Department of Physics, Centre for Lasers, University of Queensland, St. Lucia, Queensland QLD 4072 (Australia)
We investigate nonclassical Stokes-operator variances in continuous-wave polarization-squeezed laser light generated from one and two optical parametric amplifiers. A general expression of how Stokes-operator variances decompose into two-mode quadrature operator variances is given. Stokes parameter variance spectra for four different polarization-squeezed states have been measured and compared with a coherent state. Our measurement results are visualized by three-dimensional Stokes-operator noise volumes mapped on the quantum Poincare sphere. We quantitatively compare the channel capacity of the different continuous-variable polarization states for communication protocols. It is shown that squeezed polarization states provide 33% higher channel capacities than the optimum coherent beam protocol.
OSTI ID:
20634094
Journal Information:
Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
Country of Publication:
United States
Language:
English

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