Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disentanglement of Source and Target and the Laser Quantum State   Disentanglement of a laser source from its target qubit is proposed as a
criterion establishing the laser quantum state as a coherent state. It is shown
that the source-target density operator has a unique factorization in coherent
states when the environmental record monitoring laser pump quanta is ignored.
The source-target state conditioned upon the complete environmental record is
entangled, though, as a state of known total quanta number (source plus
target).

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
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The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex