Observation of twin beam correlations and quadrature entanglement by frequency doubling in a two-port resonator

Abstract

We demonstrate production of quantum correlated and entangled beams by second harmonic generation in a nonlinear resonator with two output ports. The output beams at wavelength 428.5 nm exhibit 0.9 dB of nonclassical intensity correlations and 0.3 dB of entanglement.

5 pages, 7 figures

References in corpus (5)

• Quantum information with continuous variables
• Tripartite entanglement from interlinked ${\chi }^{(2)}$ parametric interactions
• Harmonic entanglement with second-order non-linearity
• Verifying continuous variable entanglement of intense light pulses
• Intensity correlations and entanglement by frequency doubling in a dual ported resonator