13 citations · 21 across the 2 of their papers we have counts for
4 papers
Quantum Phase Transitions in the Bosonic Single-Impurity Anderson Model
Hyun-Jung Lee, Ralf Bulla
We consider a quantum impurity model in which a bosonic impurity level is coupled to a non-interacting bosonic bath, with the bosons at the impurity site subject to a local Coulomb…
Numerical Renormalization Group for Impurity Quantum Phase Transitions: Structure of Critical Fixed Points
Hyun-Jung Lee, Ralf Bulla, Matthias Vojta
The numerical renormalization group method is used to investigate zero temperature phase transitions in quantum impurity systems, in particular in the particle-hole symmetric soft-…
Numerical Renormalization Group for Quantum Impurities in a Bosonic Bath
Ralf Bulla, Hyun-Jung Lee, Ning-Hua Tong +1
We present a detailed description of the recently proposed numerical renormalization group method for models of quantum impurities coupled to a bosonic bath. Specifically, the meth…
Quantum Critical Points in Quantum Impurity Systems
H. -J. Lee, R. Bulla
The numerical renormalization group method is used to investigate zero temperature phase transitions in quantum impurity systems, in particular in the soft-gap Anderson model, wher…