Anthony James Leggett

Sir Anthony James Leggett (26 March 1938 – 8 March 2026) was a British–American theoretical physicist and professor emeritus at the University of Illinois Urbana-Champaign (UIUC). Leggett is widely recognised as a world leader in the theory of low-temperature physics, and his pioneering work on superfluidity was recognised by the 2003 Nobel Prize in Physics. He has shaped the theoretical understanding of normal and superfluid helium liquids and strongly coupled superfluids. He set directions for