Exciton-Polariton Quantum Gates Based on Continuous Variables

TL;DR

This paper proposes a continuous variable quantum gate using exciton-polaritons in microcavities, demonstrating high fidelity and scalability for quantum information processing.

Contribution

It introduces a novel exciton-polariton based continuous variable quantum gate with enhanced interaction and high fidelity, enabling scalable quantum computing architectures.

Findings

Fidelity exceeds 99% with realistic parameters

Parametric interaction can be engineered and varied in time

System allows for scalable multigate implementation

Abstract

We propose a continuous variable analog of quantum controlled-NOT gates based on a system of exciton-polaritons in semiconductor microcavities. This can be realized by the engineering of parametric interaction between control and target polariton modes, which can be varied in time. As an explicit setup we use a system of dipolaritons, which allows for enhancement of parametric interaction by auxiliary classical fields and scalable multigate system realization. The calculated fidelity is shown to exceed 99% for realistic system parameters.