Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Demonstrating shareability of multipartite Einstein-Podolsky-Rosen
  steering   Einstein-Podolsky-Rosen (EPR) steering, a category of quantum nonlocal
correlations describing the ability of one observer to influence another
party's state via local measurements, is different from both entanglement and
Bell nonlocality by possessing an asymmetric property. For multipartite EPR
steering, the monogamous situation, where two observers cannot simultaneously
steer the state of the third party, has been investigated rigorously both in
theory and experiment. In contrast to the monogamous situation, the
shareability of EPR steering in reduced subsystems allows the state of one
party to be steered by two or more observers and thus reveals more
configurations of multipartite EPR steering. However, the experimental
implementation of such a kind of shareability has still been absent until now.
Here, in an optical experiment, we provide a proof-of-principle demonstration
of the shareability of EPR steering without the constraint of monogamy in a
three-qubit system. Moreover, based on the reduced bipartite EPR steering
detection results, we verify the genuine three-qubit entanglement results. This
work provides a complementary viewpoint for understanding multipartite EPR
steering and has potential applications in many quantum information protocols,
such as multipartite entanglement detection, quantum cryptography, and the
construction of quantum networks.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph