Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continuous variable entanglement in open quantum dynamics   In the framework of the theory of open systems based on completely positive
quantum dynamical semigroups, we give a description of the dynamics of
entanglement for a system consisting of two uncoupled harmonic oscillators
interacting with a thermal environment. Using Peres-Simon necessary and
sufficient criterion for separability of two-mode Gaussian states, we describe
the evolution of entanglement in terms of the covariance matrix for a Gaussian
input state. For some values of the temperature of environment, the state keeps
for all times its initial type: separable or entangled. In other cases,
entanglement generation, entanglement sudden death or a repeated collapse and
revival of entanglement take place. We analyze also the time evolution of the
logarithmic negativity, which characterizes the degree of entanglement of the
quantum state.

14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom