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Patent
Title
Quantum key distribution for quantum secret sharing
Other Title
Quantenschlüsselverteilung für die gemeinsame Nutzung von Quantengeheimnissen
Abstract
It is claimed a method for quantum key distribution for quantum secret sharing, comprising an entangled photon source (2) and two receivers, comprising the stepsi) generation of time-energy entangled photon pairs in an entangled photon source (2), whereby the source (2) comprises a laser (20) and a non-linear element (22), whereby each entangled photon pair comprises a signal photon and an idler photon;ii) transmission of the signal photons to a first receiver (3) and the idler photons to a second receiver (4);iii) measurement of the signal and idler photons in an unbalanced Mach-Zehnder interferometer (30) or an unbalanced Michelson interferometer at each receiver and generation of a key.According to the invention, the generation of the time-energy entangled photon pairs in step i) is phase modulated, and/or the measurement of the time-energy entangled photon pairs in step ii) at the first receiver (3) and/or the second receiver (4) is phase modulated.
Inventor(s)
Marques Muniz, André Luiz
Gonzalez Martin Del Campo, Luis Javier
Tangarife Villamizar, Nicolas Eduardo
Patent Number
EP4277197 A1
Publication Date
November 15, 2023
Language
English