Hoi-Kwan Lau, Christian Weedbrook
We extend the idea of cluster state quantum secret sharing to the continuous-variable regime. Both classical and quantum information can be shared by distributing finitely squeezed continuous-variable cluster states through either secure or insecure channels. We show that the sharing rate of classical secrets can be estimated by standard continuous-variable quantum key distribution techniques. We also analyse the performance of quantum state sharing by computing the shared entanglement between the authorised parties and the dealer.
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http://arxiv.org/abs/1304.8128
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