John Clarke is a British experimental physicist and Professor Emeritus at the University of California, Berkeley. He is known for his various works on measurement devices based on superconductivity. Steven Girvin has called Clarke "the godfather of superconducting electronics." The Nobel Prize in Physics 2025, announced October 7, 2025. John Clarke, Michel H. Devoret, and John M. Martinis, “for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit”. John Clarke: born 1942, Cambridge, United Kingdom. Michel H. Devoret: born 1953, Paris, France. John M. Martinis: born 1958. Wiki link Wiki link Wiki link Data: the Nobel Foundation (CC0).