Variational solution of the superconducting Anderson impurity model and the band-edge singularity phenomena

We propose a set of variational wavefunctions for the sub-gap spin-doublet and spin-singlet eigenstates of the particle-hole symmetric superconducting Anderson impurity model. The wavefunctions include up to two Bogoliubov quasiparticles in the continuum which is necessary to correctly capture the w...

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Bibliographic Details
Published in:	SciPost Physics
Main Author:	Teodor Iličin, Rok Žitko
Format:	Article
Language:	English
Published:	SciPost 2025-07-01
Online Access:	https://scipost.org/SciPostPhys.19.1.006

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