Experimental Demonstration of Non-local Controlled-Unitary Quantum Gates Using a Five-qubit Quantum Computer

TL;DR

This paper demonstrates the implementation of non-local controlled-unitary quantum gates on a five-qubit IBM quantum computer, verifying their fidelity through quantum state and process tomography, advancing distributed quantum computing capabilities.

Contribution

It presents the first experimental realization of non-local controlled-unitary gates on a five-qubit quantum computer, validating their performance with tomography techniques.

Findings

Successful implementation of non-local controlled-unitary gates

High fidelity verified through quantum state tomography

Accurate process characterization confirming gate performance

Abstract

Local implementation of non-local quantum gates is necessary in a distributed quantum computer. Here, we demonstrate the non-local implementation of controlled-unitary quantum gates proposed by Eisert et al. (Phys Rev A 62:052317, 2000) using the five-qubit IBM quantum computer. We verify the fidelity and accuracy of the implementation through the techniques of quantum state and process tomographies.