Experimental demonstration of quantum leader election in linear optics

TL;DR

This paper demonstrates a nearly deterministic quantum leader election protocol using linear optics, overcoming classical limits and advancing quantum computing capabilities.

Contribution

It introduces a method to perform deterministic quantum leader election solely with linear optics, a significant step beyond previous non-deterministic implementations.

Findings

Achieved nearly deterministic quantum leader election

Overcame classical limits in quantum protocols

Demonstrated linear optics can enable deterministic quantum operations

Abstract

Linear optics is a promising candidate to enable the construction of quantum computers. A number of quantum protocols gates based on linear optics have been demonstrated. However, it is well-known that these gates are non-deterministic and that higher order nonlinearity is necessary for deterministic operations. We found the quantum leader election protocol (QLE) can be operated deterministically only with linear optics, and we have demonstrated the nearly deterministic operation which overcomes classical limit.