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Journal Articles Physical Review A Year : 2023

Cost and Routing of Continuous Variable Quantum Networks

Abstract

We study continuous-variable graph states as quantum communication networks. We explore graphs with regular and complex network shapes distributed among different agents and we report for their cost as a global measure of squeezing and number of squeezed modes that are necessary to build the network. We show that the trend of the squeezing cost presents a non-trivial scaling with the size of the network strictly dependent on its topology. We devise a routing protocol based on local quadrature measurements for reshaping the network in order to perform teleportation protocol between two arbitrary nodes of the networks. The \textit{Routing} protocol, which is based on wire-shortening over parallel paths among the nodes, improves the final entanglement between the two nodes in a considerable amount of cases, and it is particularly efficient in running-time for complex sparse networks.

Dates and versions

hal-03468194 , version 1 (06-12-2021)

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Federico Centrone, Frédéric Grosshans, Valentina Parigi. Cost and Routing of Continuous Variable Quantum Networks. Physical Review A, 2023, 108 (4), pp.042615. ⟨10.1103/PhysRevA.108.042615⟩. ⟨hal-03468194⟩
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