Quantum Logical Gates with Linear Quadripartite Cluster States of Continuous Variables

TL;DR

This paper proposes schemes for implementing quantum logical gates using linear quadripartite cluster states of continuous variables, analyzing noise effects and guiding experimental design for one-way quantum computing.

Contribution

It introduces concrete schemes for quantum gates with continuous variables and analyzes noise impacts, advancing experimental realization of one-way quantum computers.

Findings

Fidelity decreases with noise and finite squeezing.

Schemes are feasible for experimental implementation.

Provides theoretical foundation for optical continuous variable quantum computing.

Abstract

The concrete schemes to realize three types of basic quantum logical gates using linear quadripartite cluster states of optical continuous variables are proposed. The influences of noises and finite squeezing on the computation precision are analyzed in terms of the fidelity of propagated quantum information through the continuous variable cluster states. The proposed schemes provide direct references for the design of experimental systems of one-way quantum computer based on the cluster entanglement of amplitude and phase quadratures of light.