Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-invariant Discord: High Temperature Limit and Initial Environmental
  Correlations   We present a thorough investigation of the phenomena of frozen and
time-invariant quantum discord for two-qubit systems independently interacting
with local reservoirs. Our work takes into account several significant effects
present in decoherence models, which have not been yet explored in the context
of time-invariant quantum discord, but which in fact must be typically
considered in almost all realistic models. Firstly, we study the combined
influence of dephasing, dissipation and heating reservoirs at finite
temperature. Contrarily to previous claims in the literature, we show the
existence of time-invariant discord at high temperature limit in the weak
coupling regime, and also examine the effect of thermal photons on the
dynamical behaviour of frozen discord. Secondly, we explore the consequences of
having initial correlations between the dephasing reservoirs. We demonstrate in
detail how the time-invariant discord is modified depending on the relevant
system parameters such as the strength of the initial amount of entanglement
between the reservoirs.

25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc