Early Academic Shift Inspired by Sputnik
The launch of Sputnik, the world’s first artificial satellite, in the 1950s unexpectedly influenced Anthony Leggett’s path to winning the 2003 Nobel Prize in Physics. In 1959, Leggett had just completed a degree in greats—a study of classical literature, ancient history, and philosophy—at Balliol College, Oxford, with prospects in classical academia or the civil service.
However, Leggett’s ambitions shifted towards physics, driven by a desire to "make meaningful conjectures about the way the world works." Financial constraints would have made pursuing a second undergraduate degree difficult if not for the Soviet Union’s Sputnik launch 18 months earlier.
"It turned out to be ‘the most serendipitous event,’" Leggett later recalled. "The west had been caught out technologically because ‘we had encouraged all our best brains to study useless subjects, such as classics, rather than useful ones, such as science and engineering and particularly physics.’"
In response, scholarships were created to encourage arts students to switch to science. Leggett received one such scholarship, enabling him to study physics at Merton College, Oxford, where he earned a first-class degree in two years.
Contributions to Quantum Mechanics and Low-Temperature Physics
Leggett, who died aged 87, quickly established a strong reputation for demonstrating how quantum mechanics—the study of probabilistic and sometimes counterintuitive behavior of matter and light at atomic and subatomic scales—affects everyday phenomena.
His research focused on low-temperature physics, particularly superfluids—liquids that flow without friction or energy loss and exhibit unusual behaviors such as climbing container walls—and superconductors, materials that conduct electricity without resistance, essential for MRI scanners and particle accelerators.
During the 1970s at Sussex University, Leggett developed a theory explaining how atoms, especially helium-3, a rare light isotope of helium, interact in the superfluid state to exhibit frictionless flow. He demonstrated that electrons in helium-3 form pairs in a complex but predictable way. This discovery has applications across various scientific fields, including cosmology, subatomic particle studies, and liquid crystal research.
This pioneering work led to Leggett sharing the Nobel Prize with Russian physicists Alexei Abrikosov and Vitaly Ginzburg for their "pioneering contributions to the theory of superconductors and superfluids." The Nobel committee highlighted Leggett’s role in opening research avenues in fields such as cosmology.
Legacy and Personal Reflections
"Tony was always way ahead of the rest of us, owing not simply to his being smarter, but also to his boundless energy," said Gordon Baym, a physicist at the University of Illinois Urbana-Champaign, where Leggett was a professor from 1983 until retiring in 2019. "His enthusiasm for physics and people continued to the end."
Leggett himself remarked: "Even if it seems so at the time. Put it away in a drawer, and 10, 20 or 30 years down the road, it will come back and help you in ways you never anticipated."
Early Life and Education
Born in Camberwell, south London, Leggett was the son of Richard and Winifred (née Regan), both first-generation university graduates who became teachers. Raised in a Catholic family, Leggett later noted that this made his family "members of a small embattled minority in England," which contributed to his strong iconoclastic tendencies.
Known as Tony, he attended Beaumont College, a Jesuit school near Windsor, where his father taught physics and chemistry. The school traditionally directed academically gifted pupils toward classics, explaining Leggett’s initial study of greats at Balliol. However, private mathematics lessons from a teacher sparked his interest in science, a shift further encouraged by Sputnik’s launch.
Academic Career and International Experience
After Oxford, Leggett worked as a postdoctoral research assistant at the University of Illinois from 1964 to 1965, followed by a year at Kyoto University. There, he immersed himself fully, sharing dormitories with Japanese undergraduates, learning the language, and avoiding other foreign students. This intense behavior led to rumors that he was a CIA trainee.
Returning to Britain in 1967, Leggett became a lecturer in physics at Sussex University, later advancing to reader and professor by 1978, where he conducted the research that would earn him the Nobel Prize. In 1983, he moved back to Illinois and also held positions at the Institute for Quantum Computing in Waterloo, Canada, and the Shanghai Center for Complex Science at Shanghai Jiao Tong University.
Awards and Honors
Leggett’s accolades include the Wolf Prize in Physics (2002-03), the Paul Dirac Medal and Prize (1992), and the James Clerk Maxwell Medal and Prize (1975). He was elected a Fellow of the Royal Society in 1980 and was knighted in 2004 for his services to physics.
Family and Survivors
Leggett is survived by his wife, Haruko Kinase-Leggett, whom he met at Sussex University and married in 1973; their daughter, Asako; and his sisters, Judith and Clare. His younger brothers, Terence and Paul, predeceased him.
