Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multipartite continuous-variable entanglement from concurrent
  nonlinearities   We show theoretically that concurrent interactions in a second-order
nonlinear medium placed inside an optical resonator can generate multipartite
entanglement between the resonator modes. We show that there is a mathematical
connexion between this system and van Loock and Braunstein's proposal for
entangling N continuous quantum optical variables by interfering the outputs of
N degenerate optical parametric amplifiers (OPA) at a N-port beam splitter. Our
configuration, however, requires only one nondegenerate OPA and no
interferometer. In a preliminary experimental study, we observe the concurrence
of the appropriate interactions in periodically poled RbTiOAsO4.

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The categories of this paper are: physics
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: math
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
18
The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: eess