Realizing quantum controlled phase-flip gate through quantum dot in silicon slow-light photonic crystal waveguide

TL;DR

This paper proposes a scheme for implementing a controlled phase-flip gate between two photons using a quantum dot in a silicon slow-light photonic crystal waveguide, promising high fidelity and scalability for quantum computing.

Contribution

It introduces a novel approach leveraging slow-light photonic crystal waveguides with quantum dots for efficient quantum gate operations, surpassing cavity-assisted systems.

Findings

High gate fidelity over broadband frequencies

Enhanced Purcell and beta factors

Potential for large-scale quantum information processing

Abstract

We propose a scheme to realize controlled phase gate between two single photons through a single quantum dot in slow-light silicon photonic crystal waveguide. Enhanced Purcell factor and beta factor lead to high gate fidelity over broadband frequencies compared to cavity-assisted system. The excellent physical integration of this silicon photonic crystal waveguide system provides tremendous potential for large-scale quantum information processing.