Efficient sharing of a continuous-variable quantum secret

Details Efficient sharing of a continuous-variable quantum secret Efficient sharing of a continuous-variable quantum secret

2003-01-08

arxiv.org/abs/quant-ph/0301028v1

J Phys A 36, 7625 (2003)

Physics

Quantum Physics

7 pages, 3 figures

Scientific paper

10.1088/0305-4470/36/27/314

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.

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