https://www.sciencedaily.com/releases/2019/11/191118140323.htm

By creating a protocol that allows a quantum computer to check its own answers to difficult problems, the scientists from the University of Warwick have provided a means to confirm that a quantum computer is working correctly without excessive use of resources.

Samuele Ferracin, Theodoros Kapourniotis and Dr Animesh Datta from the University's Department of Physics have recently tackled this problem in a paper for The New Journal of Physics, published today (18 November).