More Efficient Purifying scheme via Controlled- Controlled NOT Gate

TL;DR

This paper introduces a modified quantum purification protocol using controlled-controlled NOT gates, which converges faster and uses fewer resources than previous methods.

Contribution

The paper presents a novel purification scheme replacing the controlled NOT with a controlled-controlled NOT gate, improving efficiency and resource consumption.

Findings

Faster convergence of the new protocol

Reduced consumption of low-fidelity qubits

Improved efficiency over previous methods

Abstract

A new modified version of the Oxford purification protocol is proposed. This version is based on the controlled-controlled NOT gate instead of controlled NOT in the original one. Comparisons between the results of the new version and the original and an earlier modification are given. It is found that the new version converges faster and consumes fewer initial qubit pairs of low fidelity per final qubit pair of high fidelity.