title: Numerical renormalization-group study of the Bose-Fermi Kondo model.
abstract: We extend the numerical renormalization-group method to Bose-Fermi Kondo models (BFKMs), describing a local moment coupled to a conduction band and a dissipative bosonic bath. We apply the method to the Ising-symmetry BFKM with a bosonic bath spectral function eta(omega) proportional omega(s), of interest in connection with heavy-fermion criticality. For 0 < s < 1, an interacting critical point, characterized by hyperscaling of exponents and omega/T scaling, describes a quantum phase transition between Kondo-screened and localized phases. A connection is made to other results for the BFKM and the spin-boson model.
authors.affiliation: Department of Physics, University of Florida, Gainesville, Florida 32611-8440, USA.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Glossop
authors.forename: Kevin
authors.initials: K
authors.lastname: Ingersent