Comments on the theory of superconductivity View Full Text


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Article Info

DATE

1958-03

AUTHORS

J. G. Valatin

ABSTRACT

Some ideas of the new theory of Bardeen, Cooper and Schrieffer are expressed in a more transparent form. New collective fermion variables are introduced which are linear combinations of creation and annihilation operators of electrons, and describe elementary excitations. They lead to a simple classification of excited states and a great simplification in the calculations. The structure of the excitation spectrum is investigated without equating the matrix element of the interaction potential to a constant at an early stage, and new relationships and equations are derived. The temperature dependent problem is described by means of a statistical operator, and its relationship to that of the grand canonical ensemble is established. Simple new relationships are obtained for the correlation function. More... »

PAGES

843-857

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02745589

DOI

http://dx.doi.org/10.1007/bf02745589

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016890272


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