Bright bichromatic entanglement and quantum dynamics of sum frequency generation

TL;DR

This paper explores the quantum properties of sum frequency generation, demonstrating its potential to produce non-classical light states like entangled and squeezed states, with implications for quantum information processing.

Contribution

It reveals the quantum features of sum frequency generation, including entanglement and squeezing, and highlights the failure of semiclassical models under strong pumping conditions.

Findings

Generation of quadrature squeezed light

Production of bright bichromatic entangled states

Demonstration of EPR paradox variants

Abstract

We investigate the quantum properties of the well-known process of sum frequency generation, showing that it is potentially a very useful source of non-classical states of the electromagnetic field, some of which are not possible with the more common techniques. We show that it can produce quadrature squeezed light, bright bichromatic entangled states and symmetric and asymmetric demonstrations of the Einstein-Podolsky-Rosen paradox. We also show that the semiclassical equations totally fail to describe the mean-field dynamics when the cavity is strongly pumped.