We devise the optimal form of Gaussian resource states enabling continuous-variable teleportation with maximal fidelity. We show that a nonclassical optimal fidelity of N-user teleportation networks is necessary and sufficient for N-party entangled Gaussian resources, yielding an estimator of multipartite entanglement. The entanglement of teleportation is equivalent to the entanglement of formation in a two-user protocol, and to the localizable entanglement in a multiuser one. Finally, we show that the continuous-variable tangle, quantifying entanglement sharing in three-mode Gaussian states, is defined operationally in terms of the optimal fidelity of a tripartite teleportation network.
Titolo: | Equivalence between Entanglement and the Optimal Fidelity of Continuous Variable Teleportation | |
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Data di pubblicazione: | 2005 | |
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Handle: | http://hdl.handle.net/11386/1001327 | |
Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |