High fidelity quantum gates via dynamical decoupling

TL;DR

This paper demonstrates through numerical simulations that high fidelity quantum gates can be achieved using concatenated dynamical decoupling sequences, significantly reducing decoherence effects across various system-environment interactions.

Contribution

It introduces a method to enhance quantum gate fidelity using concatenated dynamical decoupling, showing substantial improvements over unprotected gates.

Findings

Order of magnitude fidelity improvement achieved

Effective across a broad range of coupling strengths

Applicable to universal quantum gate sets

Abstract

Realizing the theoretical promise of quantum computers will require overcoming decoherence. Here we demonstrate numerically that high fidelity quantum gates are possible within a framework of quantum dynamical decoupling. Orders of magnitude improvement in the fidelities of a universal set of quantum gates, relative to unprotected evolution, is achieved over a broad range of system-environment coupling strengths, using recursively constructed (concatenated) dynamical decoupling pulse sequences.