Kondo Quartet
Antoine Georges, Anirvan Sengupta

TL;DR
This paper explores the low-energy behavior of the Kondo quartet model involving two impurities and conduction electron channels, highlighting the use of conformal field theory and bosonisation methods.
Contribution
It connects conformal field theory and bosonisation approaches to analyze the Kondo quartet model, extending understanding from the single-impurity two-channel case.
Findings
Analysis of low-energy properties of the Kondo quartet model.
Connections established between conformal field theory and bosonisation methods.
Insights into multi-impurity Kondo systems.
Abstract
This article describes some recently obtained results on the low-energy properties of the "Kondo quartet" model of two spin-1/2 impurities interacting with two channels (flavours) of conduction electrons. We shall particularly emphasize the connections between conformal field-theory methods and bosonisation approaches, which are first illustrated on the example of the single-impurity, two-channel Kondo problem. This article is dedicated to the memory of Claude Itzykson, and will appear in the Proceedings of the Conference "Advanced Quantum Field Theory", held in La Londe Les Maures, Sept. 1996 (Nucl. Phys. B, Proc. Supp.; V.Rittenberg, J.Fr\"{o}lich and A.Schwimmer eds.).
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