Evidence of the entanglement constraint on wave-particle duality using the IBM Q quantum computer

TL;DR

This paper experimentally demonstrates how entanglement constrains wave-particle duality in bipartite quantum systems using IBM Q superconducting qubits, confirming the nonlocal nature of Bohr's complementarity.

Contribution

It provides the first experimental verification of the entanglement constraint on wave-particle duality using a real quantum computer.

Findings

Entanglement limits the wave-particle duality in bipartite systems.

The complementarity 'triality' relation is confirmed for pure and mixed states.

Nonlocal entanglement completes Bohr's local complementarity principle.

Abstract

We experimentally verify the link existing between entanglement and the amount of wave-particle duality in a bipartite quantum system, with superconducting qubits in the IBM Q quantum computer. We consider both pure and mixed states, and study the influence of state purity on the observation of the complementarity "triality" relation of Jakob and Bergou. This work confirms the quantitative completion of local Bohr's complementarity principle by the nonlocal quantum entanglement typical of a truly bipartite quantum system.