Efficient sharing of a continuous-variable quantum secret

Abstract

We propose an efficient scheme for sharing a continuous variable quantum secret using passive optical interferometry and squeezers: this efficiency is achieved by showing that a maximum of two squeezers is required to replicate the secret state, and we obtain the cheapest configuration in terms of total squeezing cost. Squeezing is a cost for the dealer of the secret as well as for the receivers, and we quantify limitations to the fidelity of the replicated secret state in terms of the squeezing employed by the dealer.

7 pages, 3 figures

References in corpus (3)

• Quantum state reconstruction of the single-photon Fock state
• Universal continuous-variable quantum computation: Requirement of optical nonlinearity for photon counting
• How to share a continuous-variable quantum secret by optical interferometry

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• Quantum Optical Systems for the Implementation of Quantum Information Processing
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• Controlled Quantum Secret Sharing
• Spacetime replication of continuous variable quantum information
• Relativistic (2,3)-threshold quantum secret sharing
• Random coding for sharing bosonic quantum secrets
• Continuous-variable ramp quantum secret sharing with Gaussian states and operations