Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decoherence-free dynamics of quantum discord for two correlated qubits
  in finite-temperature reservoirs   We investigate decoherence-free evolution (DFE) of quantum discord (QD) for
two initially-correlated qubits in two finite-temperature reservoirs using an
exactly solvable model. We study QD dynamics of the two qubits coupled to two
independent Ohmic reservoirs when the two qubits are initially prepared in
X-type quantum states. It is found that reservoir temperature significantly
affects the DFE dynamics. We show that it is possible to control the DFE and to
prolong the DFE time by choosing suitable parameters of the two-qubit system
and reservoirs.

16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph