Multipartite Entanglement Swapping and Mechanical Cluster States

Carlo Ottaviani; Cosmo Lupo; Alessandro Ferraro; Mauro Paternostro; Stefano Pirandola

doi:10.1103/PhysRevA.99.030301

Multipartite Entanglement Swapping and Mechanical Cluster States

Carlo Ottaviani, Cosmo Lupo, Alessandro Ferraro, Mauro Paternostro, Stefano Pirandola

Computer Science

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	030301(R)
Journal	Physical Review A
Volume	99
DOIs	https://doi.org/10.1103/PhysRevA.99.030301
Publication status	Published - 13 Mar 2019

Bibliographical note

REVTeX. 5 pages. 2 figures. Comments are welcome

Keywords

quant-ph
cond-mat.other
physics.app-ph
physics.optics

Access to Document

10.1103/PhysRevA.99.030301

1712.08085v1Submitted manuscript, 689 KB
Multiswap_PRA(R)_v3Accepted author manuscript, 1.69 MB

Cite this

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title = "Multipartite Entanglement Swapping and Mechanical Cluster States",

abstract = " 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. ",

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AU - Lupo, Cosmo

AU - Ferraro, Alessandro

AU - Paternostro, Mauro

AU - Pirandola, Stefano

N1 - REVTeX. 5 pages. 2 figures. Comments are welcome

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