Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Markovian decoherence of a two-level system in a Lorentzian bosonic
  reservoir and a stochastic environment with finite correlation time   In this paper we investigate non-Markovian evolution of a two-level system
(qubit) in a bosonic bath under influence of an external classical fluctuating
environment. The interaction with the bath has the Lorentzian spectral density,
and the fluctuating environment (stochastic field) is represented by a set of
Ornstein-Uhlenbeck processes. Each of the subenvironments of the composite
environment is able to induce non-Markovian dynamics of the two-level system.
By means of the numerically exact method of hierarchical equations of motion,
we study dependence of the steady states of the two-level system, the reduced
density matrix evolution and the equilibrium emission spectrums on frequency
cutoffs and coupling strengths of the subenvironments. Additionally we
investigate the impact of the rotation-wave approximation (RWA) used for the
interaction with the bath on accuracy of the results.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc