Quantum noise correlations in optical dispersive waves

Abstract

The emergence of quantum-correlated states during picosecond pulse-driven dispersive wave generation in optical fibers is studied. Modeling is performed within the framework of the linearized quantum-fluctuation theory, analyzing the spectral distribution of the Pearson correlation coefficient alongside violations of the Cauchy-Schwarz inequality to identify nonclassical correlations. It is shown that the decay of a multisoliton pulse leads to the formation of a complex distribution of the Pearson coefficient in the spectral domain, characterized by alternating regions of positive and negative correlations. Crucially, fluctuations in the photon number within the dispersive wave are found to be strongly correlated with those in the main pulse. The analysis reveals that the anomalous dispersion regime exhibits specific frequencies where the Cauchy-Schwarz inequality is violated, indicating the nonclassical nature of these correlations, whereas no such violations are detected in the normal dispersion regime. Finally, it is demonstrated that stimulated Raman scattering induces a decorrelation of quantum noise and actively destroys its nonclassical nature.

Speaker

Andrey Konyukhov
Saratov State University
Russia

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