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The Penrose–Onsager–Yang Approach to Superconductivity and Superfluidity

In: Dialogues Between Physics and Mathematics

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  • Anthony Leggett

    (University of Illinois Urbana-Champaign, Department of Physics)

Abstract

While the work of Professor C.N.Yang in condensed matter physics may not be quite as universally known as that in the area of particle physics, it includes a number of seminal papers, of which the one I like best is the 1962 Reviews of Modern Physics paper entitled “Concept of off diagonal long range order and the quantum phases of liquid He and of superconductors”. Written within five years of the publication of a microscopic theory of superconductivity by Bardeen, Cooper and Schrieffer (BCS), this paper in effect asks the general question “what exactly is it that superfluid helium and superconductors have in common, and which is at the root of their anomalous properties?” Although this question has also been answered by others in rather different terms, I believe that the answer given by Yang is by far the clearest and most intuitive, and avoids raising the pseudo-questions (and providing the pseudo-answers) which competing formulations risk doing.

Suggested Citation

  • Anthony Leggett, 2022. "The Penrose–Onsager–Yang Approach to Superconductivity and Superfluidity," Springer Books, in: Mo-Lin Ge & Yang-Hui He (ed.), Dialogues Between Physics and Mathematics, chapter 0, pages 93-112, Springer.
    • Handle: RePEc:spr:sprchp:978-3-031-17523-7_4
    DOI: 10.1007/978-3-031-17523-7_4
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