Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Renormalization Group for Quantum Impurities in a Bosonic Bath   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 method is applied to the spin-boson model, both
in the Ohmic and sub-Ohmic cases. We present various results for static as well
as dynamic quantities and discuss details of the numerical implementation,
e.g., the discretization of a bosonic bath with arbitrary continuous spectral
density, the suitable choice of a finite basis in the bosonic Hilbert space,
and questions of convergence w.r.t. truncation parameters. The method is shown
to provide high-accuracy data over the whole range of model parameters and
temperatures, which are in agreement with exact results and other numerical
data from the literature.

35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci