Perturbation theory of a superconducting 0 - [pi] impurity quantum phase transition

A single-level quantum dot with Coulomb repulsion attached to two superconducting leads is studied via the perturbation expansion in the interaction strength. We use the Nambu formalism and the standard many-body diagrammatic representation of the impurity Green functions to formulate the Matsubara...

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Veröffentlicht in:	Scientific reports 2015-03, Vol.5, p.8821
Hauptverfasser:	Zonda, M, Pokorný, V, Janis, V, Novotný, T
Format:	Artikel
Sprache:	eng
Schlagworte:	Energy Phase diagrams Phase transitions Quantum dots Temperature effects
Online-Zugang:	Volltext
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