Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Frozen Gaussian quantum discord in photonic crystal cavity array system   Protecting quantum correlation from decoherence is one of the crucial issues
in quantum information processing. It has been commonly recognized that any
initial quantum correlation of a composite system diminishes asymptotically or
abruptly to zero under local Markovian decoherence. Here we show that, contrary
to this recognition, a noticeable Gaussian quantum discord of a
continuous-variable bipartite system can be frozen in the steady state in the
non-Markovian dynamics if each of the subsystems forms a localized mode with
its local reservoir. The condition for this frozen quantum discord can be
reached by appropriately engineering the structure of the reservoirs. The
possible realization of our results in a coupled cavity array system formed by
a photonic crystal is proposed.

34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs