Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equilibrium Correlation Functions of the Spin-Boson Model with Sub-Ohmic
  Bath   The spin-boson model is studied by means of flow equations for Hamiltonians.
Our truncation scheme includes all coupling terms which are linear in the
bosonic operators. Starting with the canonical generator $\eta_c=[H_0,H]$ with
$H_0$ resembling the non-interacting bosonic bath, the flow equations exhibit a
universal attractor for the Hamiltonian flow. This allows to calculate
equilibrium correlation functions for super-Ohmic, Ohmic and sub-Ohmic baths
within a uniform framework including finite bias.

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The categories of this paper are: math-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
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The categories of this paper are: econ
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph