Genuine Network Multipartite Entanglement
- URL: http://arxiv.org/abs/2002.02773v3
- Date: Fri, 18 Dec 2020 11:22:41 GMT
- Title: Genuine Network Multipartite Entanglement
- Authors: Miguel Navascues, Elie Wolfe, Denis Rosset, Alejandro Pozas-Kerstjens
- Abstract summary: We argue that a source capable of distributing bipartite entanglement can, by itself, generate genuine $k$-partite entangled states for any $k$.
We provide analytic and numerical witnesses of genuine network entanglement, and we reinterpret many past quantum experiments as demonstrations of this feature.
- Score: 62.997667081978825
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The standard definition of genuine multipartite entanglement stems from the
need to assess the quantum control over an ever-growing number of quantum
systems. We argue that this notion is easy to hack: in fact, a source capable
of distributing bipartite entanglement can, by itself, generate genuine
$k$-partite entangled states for any $k$. We propose an alternative definition
for genuine multipartite entanglement, whereby a quantum state is genuinely
network $k$-entangled if it cannot be produced by applying local
trace-preserving maps over several $k$-partite states distributed among the
parties, even with the aid of global shared randomness. We provide analytic and
numerical witnesses of genuine network entanglement, and we reinterpret many
past quantum experiments as demonstrations of this feature.
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