Biography:Anthony Leggett

Anthony Leggett
Anthony Leggett
Born	26 March 1938 London, England
Known for	Superfluid helium-3; macroscopic quantum phenomena; Leggett-Garg inequality
Awards	Nobel Prize in Physics (2003); Wolf Prize in Physics (2002/2003)

Anthony James Leggett (born 26 March 1938) is a British-American theoretical physicist known for work on superfluidity, superconductivity, and macroscopic quantum systems.

Quantum context

Leggett's theory of superfluid helium-3 clarified how paired fermions can form a coherent quantum liquid with rich order-parameter structure. This work connected condensed-matter physics with broader ideas about symmetry breaking and quantum many-body states.

He also developed influential tests and models for macroscopic quantum behavior, including the Leggett-Garg inequality, making his work relevant to Physics:Quantum decoherence and the boundary between microscopic and macroscopic quantum phenomena.

Linked Quantum Collection pages

• Physics:Quantum decoherence
• Physics:Quantum superconductivity
• Physics:Quantum statistical mechanics
• Physics:Quantum many-body

References

• "The Nobel Prize in Physics 2003". Nobel Prize Outreach. https://www.nobelprize.org/prizes/physics/2003/summary/. 
• Leggett, A. J. (1980). "Macroscopic Quantum Systems and the Quantum Theory of Measurement". Progress of Theoretical Physics Supplement 69: 80-100. doi:10.1143/PTP.69.80. 

Author: Harold Foppele

Source attribution: Biography:Anthony Leggett