Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multipartite Entanglement Swapping and Mechanical Cluster States   We present a protocol for generating multipartite quantum correlations across
a quantum network with a continuous-variable architecture. An arbitrary number
of users possess two-mode entangled states, keeping one mode while sending the
other to a central relay. Here a suitable multipartite Bell detection is
performed which conditionally generates a cluster state on the retained modes.
This cluster state can be suitably manipulated by the parties and used for
tasks of quantum communication in a fully optical scenario. More interestingly,
the protocol can be used to create a purely-mechanical cluster state starting
from a supply of optomechanical systems. We show that detecting the optical
parts of optomechanical cavities may efficiently swap entanglement into their
mechanical modes, creating cluster states up to 5 modes under suitable
cryogenic conditions.

25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph