STOCKHOLM – October 7, 2025 – The Nobel Prize in Physics for 2025 has been awarded to John Clarke, Michel H. Devoret, and John M. Martinis for their groundbreaking experimental work on quantum mechanical tunneling and energy quantization in electrical circuits. This monumental discovery has not only advanced fundamental understanding of quantum mechanics but has also laid the groundwork for the current digital revolution and is poised to drive the next generation of quantum technologies.
Unveiling Macroscopic Quantum Phenomena
The trio, whose research primarily took place in the United States with significant affiliations to universities on the West Coast, were recognized by the Royal Swedish Academy of Sciences for demonstrating how the bizarre and counterintuitive principles of quantum mechanics can be observed and harnessed on a macroscopic scale. Quantum tunneling, a phenomenon where particles can pass through energy barriers that classical physics deems impassable, and energy quantization—the principle that energy is absorbed or emitted in discrete packets—were proven in a tangible electrical circuit. This work, conducted in the mid-1980s, took these effects from the realm of individual subatomic particles into systems large enough to be engineered and studied directly.
“To put it mildly, it was the surprise of my life,” stated Professor John Clarke, an emeritus professor at the University of California, Berkeley, upon receiving the news. He shared credit with his collaborators, Michel H. Devoret of Yale University and the University of California, Santa Barbara, and John M. Martinis of the University of California, Santa Barbara, acknowledging that “their contributions are just overwhelming”. The Nobel Committee highlighted that their findings offer “opportunities for developing the next generation of quantum technology, including quantum cryptography, quantum computers, and quantum sensors”.
The Science Behind the Breakthrough
Quantum mechanics describes the universe at its most fundamental level, often characterized by phenomena that defy everyday intuition. One such phenomenon is quantum tunneling, where particles like electrons can surmount energy barriers not by having enough energy to go over them, but by passing through them, a concept explained by their wave-like nature. The laureates’ crucial contribution was to demonstrate this effect within an electrical circuit built using superconductors—materials that conduct electricity with zero resistance—separated by a thin insulating layer. They showed that even in this comparatively large system, quantum tunneling occurred, and that the circuit’s energy absorption and emission happened in specific, quantized amounts, precisely as predicted by quantum theory.
Paving the Way for Modern and Future Technologies
The implications of this research are far-reaching. The understanding and application of quantum tunneling are foundational to much of modern digital technology. “It is wonderful to be able to celebrate the way that century-old quantum mechanics continually offers new surprises. It is also enormously useful, as quantum mechanics is the foundation of all digital technology,” commented Olle Eriksson, Chair of the Nobel Committee for Physics. Clarke himself noted that the principles underlying their discovery are critical for the function of everyday devices like cellphones.
Beyond current electronics, the laureates’ work is a cornerstone for emerging quantum technologies. Their experiments are directly linked to the development of quantum computers, which promise to solve problems intractable for even the most powerful supercomputers today. Furthermore, their discoveries are vital for advancements in quantum cryptography, offering potentially unhackable communication systems, and for quantum sensors capable of unprecedented measurement sensitivity.
A Nobel Tradition Continues
This marks the 119th awarding of the Nobel Prize in Physics. The announcement follows last year’s recognition of artificial intelligence pioneers John Hopfield and Geoffrey Hinton for their work on machine learning. The Nobel Prizes are a testament to scientific investigations that significantly benefit humanity. The Nobel Prize in Medicine was announced earlier this week, recognizing discoveries related to the immune system. Further announcements for Chemistry, Literature, Peace, and Economics prizes are scheduled for the coming days. The official award ceremony will take place on December 10.
The scientific community widely hails this year’s physics prize as a crucial acknowledgment of fundamental research that bridges theoretical physics with practical engineering, directly shaping our technological present and future. The continued exploration of quantum phenomena, driven by such foundational discoveries, promises further innovations that will undoubtedly continue to trend globally.
