Extra phase noise from thermal fluctuations in nonlinear optical crystals

J. E. S. César, A.S. Coelho, K.N. Cassemiro, A.S. Villar, Mikael Østergaard Lassen, P. Nussenzveig, M. Martinelli

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Abstract

We show theoretically and experimentally that scattered light by thermal phonons inside a second-order nonlinear crystal is the source of additional phase noise observed in optical parametric oscillators. This additional phase noise reduces the quantum correlations and has hitherto hindered the direct production of multipartite entanglement in a single nonlinear optical system. We cooled the nonlinear crystal and observed a reduction in the extra noise. Our treatment of this noise can be successfully applied to different systems in the literature.
Original languageEnglish
JournalPhysical Review A
Volume79
Issue number6
Pages (from-to)063816
ISSN2469-9926
DOIs
Publication statusPublished - 2009

Bibliographical note

Copyright 2009 American Physical Society

Keywords

  • TELEPORTATION
  • AMPLITUDE
  • GENERATION
  • QUANTUM CORRELATIONS
  • LIGHT
  • ABOVE-THRESHOLD
  • ENTANGLEMENT
  • LASER-BEAMS
  • CONTINUOUS-VARIABLES
  • NONDEGENERATE PARAMETRIC OSCILLATION

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