Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characteristic Time and Maximum Mixedness: Single Mode Gaussian States
  in Dissipative Channels   We derive an upper limit for the mixedness of single bosonic mode gaussian
states propagating in dissipative channels. It is a function of the initial
squeezing and temperature of the channel only. Moreover the time at which von
Neumann's entropy reaches its maximum value coincides with that of complete
loss of coherence, thus defining a quantum-classical transition.

36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex