Cavity QED implementation of the multi-qubit refined Deutsch-Jozsa algorithm

TL;DR

This paper proposes a method to implement a multi-qubit refined Deutsch-Jozsa algorithm using cavity QED with Rydberg atoms, achieving high fidelity despite imperfections, and is feasible with current technology.

Contribution

It introduces a cavity QED scheme for multi-qubit refined Deutsch-Jozsa algorithm with efficient controlled phase gates and robustness against decay and imperfections.

Findings

High-fidelity implementation possible with current technology

Controlled phase gates achieved efficiently in cavity QED

Robustness against cavity decay and imperfections

Abstract

We theoretically study the realization of a multi-qubit refined Deutsch-Jozsa (DJ) algorithm using resonant interaction of many Rydberg atoms with a single-mode microwave cavity, in which the multi-qubit controlled phase gates could be accomplished efficiently. We show how to achieve a multi-qubit refined DJ algorithm in high fidelity, even in the case of a weak cavity decay and some imperfection. We argue that the required operations in our scheme are almost within the present experimental possibilities.