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Nobel Prize in Physics 2025 Honors Clarke, Devoret and Martinis for Macroscopic Quantum Effects

Mid‑1980s Josephson‑junction experiments revealed macroscopic quantum behavior, a cornerstone for next‑generation quantum technologies.

Overview

  • The Royal Swedish Academy of Sciences awarded the prize for demonstrating quantum tunneling and quantized energy exchange in superconducting electrical circuits.
  • Their hand‑held circuit behaved as a single quantum system that could tunnel between states and absorb or emit energy in discrete quanta.
  • The work, carried out around 1984–1985 using Josephson junctions, showed that quantum laws can govern systems large enough to measure directly.
  • The Nobel citation links these results to advances in quantum computers, quantum cryptography and quantum sensors, an impact emphasized by the Nobel committee.
  • Each laureate receives a gold medal, a diploma and a share of 11 million Swedish kronor, with formal celebrations scheduled in Stockholm on December 10.