Publication details

How to share a continuous-variable quantum secret by optical interferometry


TYC Tomáš SANDERS Barry C.

Year of publication 2002
Type Article in Periodical
Magazine / Source Physical Review A
MU Faculty or unit

Faculty of Science

Field Theoretical physics
Keywords quantum secret; squeezing; quadrature; interferometry
Description We develop the theory of continuous-variable quantum secret sharing and propose its interferometric realization using passive and active optical elements. In the ideal case of infinite squeezing, a fidelity F of unity can be achieved with respect to reconstructing the quantum secret. We quantify the reduction in fidelity for the (2,3) threshold scheme due to finite squeezing and establish the condition for verifying that genuine quantum secret sharing has occurred.

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