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Bardeen-Cooper- Schrieffer (BCS) theory and Yang's concept of off- diagonal long- range order (ODLRO)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström.
2014 (English)In: Molecular Physics, ISSN 0026-8976, E-ISSN 1362-3028, Vol. 112, no 5-6, 694-699 p.Article in journal (Refereed) Published
Abstract [en]

In this contribution, we pay tribute to the scientific achievements of Professor Rodney J. Bartlett on account of his seminal contributions to the many-body electron correlation problem. We are here concerned with strongly correlated situations as met in the theory of superconductivity. In condensed matter physics, one often makes use of the famous Bardeen-Cooper-Schrieffer (BCS) formulation, while quantum chemists often instigate an approach that originates in Yang's concept of off-diagonal long-range order (ODLRO), and the Coleman-Sasaki extreme state. Our aim is to demonstrate that both approaches are essentially equivalent by deriving the BCS gap equation from the assumption of the presence of ODLRO.

Place, publisher, year, edition, pages
2014. Vol. 112, no 5-6, 694-699 p.
Keyword [en]
BCS theory, off-diagonal long-range order, BCS gap equation, mirror theorem, reduced Hamiltonian
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-225100DOI: 10.1080/00268976.2013.853112ISI: 000333941400018OAI: oai:DiVA.org:uu-225100DiVA: diva2:719906
Available from: 2014-05-27 Created: 2014-05-27 Last updated: 2015-01-07Bibliographically approved

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Brändas, Erkki
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