Efficient sharing of a continuous-variable quantum secret

Tomáš Tyc; David J. Rowe; Barry C. Sanders

doi:10.1088/0305-4470/36/27/314

Efficient sharing of a continuous-variable quantum secret

Tomáš Tyc, David J. Rowe, Barry C. Sanders

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

28 Citations (Scopus)

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 extract 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 extracted secret state in terms of the squeezing employed by the dealer.

Original language	English
Pages (from-to)	7625-7637
Number of pages	13
Journal	Journal of physics A : mathematical and general
Volume	36
Issue number	27
DOIs	https://doi.org/10.1088/0305-4470/36/27/314
Publication status	Published - 2003

Keywords

quantum information
quantum cryptography
quantum state engineering and measurements

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10.1088/0305-4470/36/27/314

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title = "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 extract 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 extracted secret state in terms of the squeezing employed by the dealer.",

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AB - 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 extract 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 extracted secret state in terms of the squeezing employed by the dealer.

KW - quantum information

KW - quantum cryptography

KW - quantum state engineering and measurements

U2 - 10.1088/0305-4470/36/27/314

DO - 10.1088/0305-4470/36/27/314

M3 - Article

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EP - 7637

JO - Journal of Physics A: Mathematical and General

JF - Journal of Physics A: Mathematical and General

SN - 0305-4470

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Efficient sharing of a continuous-variable quantum secret

Abstract

Keywords

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