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"REQUIEM AETERNAM DONA EIS DOMINE"

 

OBITUARIES 2026

 

Sir Anthony Leggett (55)

Nobel laureate Sir Anthony James Leggett, widely recognized as a world leader in condensed matter physics and for his pioneering work on superfluidity and the quantum mechanics of macroscopic systems, died March 8. He was 87 years old.

Leggett had been the John D. and Catherine T. MacArthur Professor of Physics at the University of Illinois Urbana-Champaign since 1983. His research in theoretical condensed matter physics and the foundations of quantum mechanics won the 2003 Nobel Prize in Physics for his contributions to the theory of superconductors and superfluids.

Leggett was born in Camberwell, South London, in 1938. He began his college education as a classics major, graduating from Oxford University with a B.A. in 1959. After completing his first degree, he began a second undergraduate degree at Oxford, this time in physics.

He joined the University of Illinois physics department as a postdoctoral researcher in 1964, later spending time at the University of Sussex before returning to Illinois, where he remained until his retirement in 2018.

Leggett is survived by his wife, Haruko Kinase-Leggett, his daughter, Elizabeth Asako Kinase-Leggett, and his sisters, Judith Leggett and Clare Prangley.