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Phys Rev Lett. 2006 Feb 17;96(6):063601. Epub 2006 Feb 13.

Harmonic entanglement with second-order nonlinearity.

Author information

  • 1Quantum Optics Group, Department of Physics, Faculty of Science, The Australian National University, ACT 0200, Australia.

Abstract

We investigate the second-order nonlinear interaction as a means to generate entanglement between fields of differing wavelengths and show that perfect entanglement can, in principle, be produced between the fundamental and second-harmonic fields in these processes. Neither pure second-harmonic generation nor parametric oscillation optimally produce entanglement; such optimal entanglement is rather produced by an intermediate process.

PMID:
16605992
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