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New second branch of the spectrum of the BCS Hamiltonian and a “pseudogap”

The BCS Hamiltonian of superconductivity has the second branch of eigenvalues and eigenvectors. It consists of wave functions of pairs of electrons in ground and excited states. The continuous spectrum of excited pairs is separated by a nonzero gap from the point of the discrete spectrum that corres...

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Bibliographic Details
Date:	2005
Main Authors:	Petrina, D. Ya., Петрина, Д. Я.
Format:	Article
Language:	English
Published:	Institute of Mathematics, NAS of Ukraine 2005
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/3704
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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