State Engineering via Nonlinear Interferometry with Linear Spectral Phases

TL;DR

This paper introduces a protocol using nonlinear interferometry with linear spectral phases to generate high-dimensional spectral qudits and entangled states, enhancing control over spectral correlations in quantum light.

Contribution

It presents a novel method for engineering complex quantum states with improved spectral correlation control using a nonlinear interferometer with linear spectral phases.

Findings

Modeling of loss effects on interference visibility and state quality.

Demonstration of generating high-dimensional spectral entangled states.

Analysis of spectral correlation control in quantum state engineering.

Abstract

Many protocols within quantum cryptography, communications, and computing require the ability to generate entangled states as well as spectral qudits. Nonlinear interferometry is a viable way to engineer these complex quantum states of light. However, it is difficult to achieve a high level of control over spectral correlations. Here, we present a protocol utilizing a nonlinear interferometer with linear spectral phases that can generate both high-dimensional spectral qudits and high-dimensional entangled states. We model the effect of loss and loss of overlap on interference visibility and thereby on the states generated.