In a landmark announcement on October 7, 2025, the Royal Swedish Academy of Sciences declared that the Nobel Prize in Physics has been awarded to three pioneering scientists — John Clarke, Michel H. Devoret, and John M. Martinis — for their groundbreaking work in demonstrating quantum mechanical phenomena in macroscopic systems. The award recognizes their discovery of macroscopic quantum tunnelling and energy quantisation in electrical circuits, research that has profoundly shaped the field of quantum technology. The trio’s work proved that the strange, counterintuitive principles of quantum mechanics — once believed to operate only at the subatomic level — can, in fact, be observed in systems large enough to be manipulated directly. Their discoveries have since become foundational to the development of quantum computers, quantum sensors, and other advanced technologies that rely on controlling quantum states. The three laureates will share the prize money of 11 million Swedish kronor (approximately 1.1 million USD), with each receiving an equal share.
John Clarke, aged 83, is a distinguished British-born physicist based at the University of California, Berkeley. Known for his contributions to superconducting devices and quantum detection systems, Clarke’s research has long bridged theory and experiment. He has been instrumental in developing ultra-sensitive quantum circuits that can detect incredibly small magnetic fields. Michel H. Devoret, a French physicist currently at Yale University, has spent decades exploring the boundaries between classical and quantum physics. His research has helped establish the field of quantum electronic circuits, where quantum states can be created, measured, and controlled with remarkable precision. John M. Martinis, a leading researcher at the University of California, Santa Barbara, is known for developing practical superconducting qubits — the building blocks of quantum computers. His work has connected the principles of quantum tunnelling and energy quantisation to real-world engineering, helping make scalable quantum computing a possibility. All three scientists have collaborated extensively throughout their careers, blending experimental insight with theoretical depth. While their paths began in different countries, their shared curiosity about how quantum rules could manifest on a larger scale brought them together in what has become a defining partnership in modern physics.
The Nobel Committee highlighted their discovery of macroscopic quantum tunnelling and energy quantisation — two cornerstone concepts that revolutionized how scientists understand the quantum world. Quantum tunnelling refers to the phenomenon where particles can pass through energy barriers that would be insurmountable under classical physics. This strange behavior, typical of electrons or photons, had long been observed only at the atomic level. Clarke, Devoret, and Martinis demonstrated that similar effects occur in superconducting electrical circuits — systems large enough to be seen under a microscope, and even manipulated by hand. In these systems, the quantum mechanical properties of superconductors allow electrons to behave as a single collective wave. The team’s experiments showed that entire electrical currents could tunnel between energy states, just as single particles do in quantum systems. This proved that quantum laws are not confined to the microscopic realm but can govern engineered devices as well. Alongside tunnelling, the scientists demonstrated energy quantisation in these macroscopic circuits. In classical physics, energy can vary continuously, but in quantum systems, it takes discrete values — like steps on a staircase. Their work revealed that circuits built from superconducting materials could occupy distinct energy levels, a principle that later became the foundation of superconducting qubits in quantum computers.
This research marks a pivotal bridge between the theoretical elegance of quantum mechanics and its practical application. For nearly a century, quantum effects were studied mainly in particles like electrons, protons, and photons — systems so small that they seemed far removed from the world of everyday technology. By bringing quantum behavior into engineered electrical circuits, Clarke, Devoret, and Martinis opened the door to quantum engineering — the deliberate construction of devices that harness the rules of the quantum realm. Their findings underpin much of today’s work in quantum computing, where information is stored in qubits that can exist in multiple states simultaneously, vastly increasing computing power. Superconducting qubits — based directly on the discoveries recognized by this Nobel Prize — are at the core of research by major tech companies and national laboratories worldwide. The implications extend beyond computing. Their work also supports the development of quantum sensors capable of detecting minute changes in magnetic and gravitational fields, and quantum cryptography, which promises virtually unbreakable communication systems. The Nobel Committee noted that their discoveries not only advanced fundamental physics but also transformed it into a practical science with far-reaching technological and commercial applications. The trio’s achievements illustrate how curiosity-driven research can evolve into innovations that redefine entire industries.
While the experiments that earned them the Nobel Prize date back to the 1980s and 1990s, their significance has only grown over time. As quantum technology has advanced in the 21st century, the foundational nature of their work has become ever clearer. John Clarke, in his reaction to the award, described the honor as “the surprise of my life,” adding that the discoveries made decades ago are now “finding their way into technologies we use daily.” Devoret called the recognition “a testament to the power of curiosity-driven science,” while Martinis highlighted how “quantum mechanics is no longer confined to textbooks — it’s becoming an engineering discipline.” Their combined efforts have inspired generations of physicists and engineers, blending fundamental physics with practical innovation.
The 2025 Nobel Prize in Physics reflects the growing importance of quantum science in global research and technology. Governments and private industries are investing billions in quantum technologies, seeing them as the next frontier in computation, communication, and sensing. In this landscape, the laureates’ work stands as a reminder that even the most advanced technologies trace their roots to fundamental research. The ability to manipulate quantum behavior in circuits represents one of the most profound achievements in physics — transforming abstract theory into applied reality. Over the years, many Nobel Prizes in Physics have honored discoveries that revealed the microscopic world’s mysteries. But this award distinguishes itself by recognizing how those same mysteries can be engineered, scaled, and used to build the future.
The laureates will formally receive their medals and diplomas at the Nobel Prize ceremony in Stockholm on December 10. Their work continues to guide global efforts in creating practical quantum computers and devices. In recognizing John Clarke, Michel H. Devoret, and John M. Martinis, the Royal Swedish Academy celebrates not just a scientific breakthrough, but a new vision of what physics can achieve — transforming quantum mechanics from a subject of philosophical wonder into a foundation of the technological world. Their research proves that even at the largest scales, the universe still dances to the rhythm of quantum laws — subtle, strange, and profoundly powerful.
