Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of a large-spin-boson system in the strong coupling regime   We investigate collective effects of an ensemble of biased two level systems
interacting with a bosonic bath in the strong coupling regime. The two level
systems are described by a large pseudo-spin J. An equation for the expectation
value M(t) of the z-component of the pseudo spin is derived and solved
numerically for an ohmic bath at T=0. In case of a large cut-off frequency of
the spectral function, a Markov approximation is justified and an analytical
solution is presented. We find that M(t) relaxes towards a highly correlated
state with maximum value $\pm J$ for large times. However, this relaxation is
extremely slow for most parameter values so as if the system was "frozen in" by
interaction with the bosonic bath.

17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex