Two-Mode Correlation of Microwave Quantum Noise Generated by Parametric Down-Conversion

N. Bergeal, F. Schackert, L. Frunzio, and M. H. Devoret
Phys. Rev. Lett. 108, 123902 – Published 21 March 2012
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Abstract

In this Letter, we report the observation of the correlation between two modes of microwave radiation resulting from the amplification of quantum noise by the Josephson parametric converter. This process, seen from the pump, can be viewed as parametric down-conversion. The correlation is measured by an interference experiment displaying a contrast better than 99% with a number of photons per mode greater than 250 000. Dispersive measurements of mesoscopic systems and quantum encryption can benefit from this development.

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  • Received 6 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.123902

© 2012 American Physical Society

Authors & Affiliations

N. Bergeal1,2, F. Schackert2, L. Frunzio2, and M. H. Devoret2

  • 1Laboratoire de Physique et d’Etude des Matériaux—UMR8213-CNRS, ESPCI ParisTech, 10 Rue Vauquelin—75005 Paris, France
  • 2Departments of Physics and Applied Physics, Yale University, New Haven, Connecticut, 06520-8284 USA

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Issue

Vol. 108, Iss. 12 — 23 March 2012

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