Analysis of locality on a quantum computer with Bell-type inequalities

Abstract

The violation of the first three of Bell’s inequalities is tested on the 5-qubit IBM quantum computer. A hidden variable proposition is used to make sure we do not cherry-pick our results. To prove the inequalities we created an entangled state and measured it on different directions. The experimental data shows that there is a clear violation of the three inequalities. Furthermore, the data matches the quantum mechanics prediction more than the hidden variables one. Thus we conclude that the computer behaves as quantum mechanics dictates with some systematic error