300 citations · 532 across the 16 of their papers we have counts for
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Optimal broadening of finite energy spectra in the numerical renormalization group: application to dissipative dynamics in two-level systems
Axel Freyn, Serge Florens
Numerical renormalization group (NRG) calculations of quantum impurity models, based on a logarithmic discretization in energy of electronic or bosonic Hamiltonians, provide a powe…
Boundary quantum criticality in models of magnetic impurities coupled to bosonic baths
Serge Florens, Lars Fritz, Matthias Vojta
We investigate quantum impurity problems, where a local magnetic moment is coupled to the spin density of a bosonic environment, leading to bosonic versions of the standard Kondo a…
Nanoscale Dynamical Mean-Field Theory for Molecules and Mesoscopic Devices in the Strong-Correlation Regime
Serge Florens
We develop a nanoscale dynamical mean-field theory (nano-DMFT) to deal with strong Coulomb interaction effects in physical systems that are intermediate in size between atoms and b…
Universal crossovers and critical dynamics of quantum phase transitions: A renormalization group study of the pseudogap Kondo problem
Lars Fritz, Serge Florens, Matthias Vojta
The pseudogap Kondo problem, describing a magnetic impurity embedded in an electronic environment with a power-law density of states, displays continuous quantum phase transitions…
The Kondo effect in bosonic spin liquids
Serge Florens, Lars Fritz, Matthias Vojta
In a metal, a magnetic impurity is fully screened by the conduction electrons at low temperature. In contrast, impurity moments coupled to spin-1 bulk bosons, such as triplet excit…
Critical points and non-Fermi liquids in the underscreened pseudogap Kondo model
Serge Florens, Matthias Vojta
Numerical Renormalization Group simulations have shown that the underscreened spin-1 Kondo impurity model with power-law bath density of states (DOS) $ρ(\w) \propto |\w|^r$ possess…