Improved quantum correlations in second harmonic generation with a squeezed pump

Abstract

We investigate the effects of a squeezed pump on the quantum properties and conversion efficiency of the light produced in single-pass second harmonic generation. Using stochastic integration of the two-mode equations of motion in the positive-P representation, we find that larger violations of continuous-variable harmonic entanglement criteria are available for lesser effective interaction strengths than with a coherent pump. This enhancement of the quantum properties also applies to violations of the Reid-Drummond inequalities used to demonstrate a harmonic version of the Einstein-Podolsky-Rosen paradox. We find that the conversion efficiency is largely unchanged except for very low pump intensities and high levels of squeezing.

19 pages, 7 figures

References in corpus (3)

• Steering, Entanglement, Nonlocality, and the EPR Paradox
• Observation of one-way Einstein-Podolsky-Rosen steering
• Quantum Communications with Compressed Decoherence Using Bright Squeezed Light

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• Quantum correlations across two octaves from combined up and down conversion
• Tripartite correlations over two octaves from cascaded harmonic generation