1.5k citations · 5k across the 55 of their papers we have counts for
55 papers
Competition between Kondo and Kitaev Physics in Kitaev clusters coupled to a fermionic bath
Tathagata Chowdhury, Achim Rosch, Ralf Bulla
Geometrically frustrated quantum impurities coupled to metallic leads have been shown to exhibit rich behavior with a quantum phase transition separating Kondo screened and local m…
The classical harmonic chain: solution via Laplace transforms and continued fractions
Nick Kwidzinski, Ralf Bulla
The harmonic chain is a classical many-particle system which can be solved exactly for arbitrary number of particles (at least in simple cases, such as equal masses and spring cons…
Validity of the local self-energy approximation: Application to coupled quantum impurities
Andrew K. Mitchell, Ralf Bulla
We examine the quality of the local self-energy approximation, applied here to models of multiple quantum impurities coupled to an electronic bath. The local self-energy is obtaine…
Critical quasiparticles in single-impurity and lattice Kondo models
Matthias Vojta, Ralf Bulla, Peter Wölfle
Quantum criticality in systems of local moments interacting with itinerant electrons has become an important and diverse field of research. Here we review recent results which conc…
Quantum phase transitions and thermodynamics of the power-law Kondo model
Andrew K. Mitchell, Matthias Vojta, Ralf Bulla +1
We revisit the physics of a Kondo impurity coupled to a fermionic host with a diverging power-law density of states near the Fermi level, , with exponent .…
Generalized Wilson Chain for solving multichannel quantum impurity problems
Andrew K. Mitchell, Martin R. Galpin, Samuel Wilson-Fletcher +2
The Numerical Renormalization Group is used to solve quantum impurity problems, which describe magnetic impurities in metals, nanodevices, and correlated materials within DMFT. Her…