Noisy One-Way Quantum Computations: The Role of Correlations

TL;DR

This paper develops a scheme to evaluate the fidelity of noisy one-way quantum computations and investigates how correlations, especially entanglement, influence computational quality, revealing that more entanglement does not always mean better performance.

Contribution

It introduces a formalism for assessing computation fidelity in noisy one-way quantum models and analyzes the impact of correlations on computational accuracy.

Findings

Higher entanglement does not always improve computation fidelity.

The formalism can be applied to various computation instances.

Correlations play a nuanced role in noisy quantum computations.

Abstract

A scheme to evaluate computation fidelities within the one-way model is developed and explored to understand the role of correlations in the quality of noisy quantum computations. The formalism is promptly applied to many computation instances, and unveils that a higher amount of entanglement in the noisy resource state does not necessarily imply a better computation.