The quantum advantage: a novel demonstration


Is a quantum machine really more efficient than a conventional machine for performing calculations? Demonstrating this ‘advantage’ experimentally is particularly complex and a major research challenge around the world1. Scientists from the CNRS2, the University of Edinburgh (Scotland) and the QC Ware, Corp., (France and USA) have just proved that a quantum machine can perform a given verification task in seconds when the same exercise would take a time equivalent to the age of the universe for a conventional computer. For this demonstration, they combined a complex interactive algorithm that solves a certain type of mathematical problem with limited information and a simple experimental photonics system that can be made in all advanced photonics laboratories. Their work was published on 8 February 2021 in Nature Communications.

  • 1. In 2019, Google achieved the first demonstration of this type when it sampled from random quantum circuits on their Sycamore chip, made of 53 superconducting qubits. Very recently, Chinese researchers have shown a quantum advantage with boson sampling using an elaborate photonic configuration.
  • 2. At the LIP6 Laboratory (CNRS/Sorbonne University) and the Institut de Recherche en Informatique Fondamentale (CNRS/University of Paris).

Experimental demonstration of quantum advantage for NP verification with limited information. Federico Centrone, Niraj Kumar, Eleni Diamanti, and Iordanis Kerenidis. Nature Communications, February 8, 2021. DOI : 10.1038/s41467-021-21119-1


Eleni Diamanti
CNRS Researcher
Iordanis Kerenidis
CNRS / QC Ware Corp Researcher
Alexiane Agullo
CNRS press officer