Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entangled self-phase locked states of light   We explore in detail the possibility of generation of continuous-variable
(CV) entangled states of light fields with well-localized phases. We show that
such quantum states, called entangled self-phase locked states, can be
generated in nondegenerate optical parametric oscillator (NOPO) based on a
type-II phase-matched down-conversion combined with polarization mixer in a
cavity. A quantum theory of this device, recently realized in the experiment,
is developed for both sub-threshold and above-threshold operational regimes. We
show that the system providing relative phase coherence between two generated
modes also exhibits different types of quantum correlations between photon
numbers and phases of these modes. We quantify the entanglement as two-mode
squeezing and show that CV entanglement is realized for both unitary,
non-dissipative dynamics and for dissipative NOPO in the entire range of pump
field intensities.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
7
The categories of this paper are: hep-th