Verlustarme Leitweglenkung für Quantenkommunikation

Details

Veröffentlichungs-Nr.

EP4160976

Aktenzeichen

EP21200138

Anmeldetag

30. September 2021

Veröffentlichung

26. März 2025

Erteilung

26. März 2025

Rechtsraum

EP

IPC

H04L9/08H04B10/70H04J14/02

Abstract

It is claimed a method of low loss routing for quantum communication, comprising a single photon source (1) and/or a weak coherent light source (1) for decoy state quantum key distribution, a router (3), two or more receivers (5), and a quantum network connecting each receiver (5) via a quantum channel (4) with the router (3), whereby the method comprises the steps i) generation of a quantum state in the source (1) and transmission of the quantum state to the router (3), whereby the quantum state is a single photon and/or a weak coherent light pulse; ii) allocation of the quantum state based on the wavelength of the quantum state to a quantum channel (4) by the router (3); iii) transmission of the quantum state via the quantum channel (4) to a receiver (5); iv) detection of the quantum state at the receiver (5) in order to establish a quantum communication between the source (1) and the receiver (5); According to the invention the source (1) comprises a modification means (2), and the source (1) is connected with the router (3) via a multi-wavelength quantum channel (6), and the modification means (2) set the wavelength of the generated quantum state in step i) in order to enable a specific allocation of the quantum state in step ii) to a specific quantum channel (4) to a specific receiver (5), in order to enable a quantum communication between the source (1) and the specific receiver (5).

Anmelder

Firma

Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Land

🇩🇪 Deutschland

Fachgebiete