Quantum communication networking method and system based on multi-wavelength channel aliasing entangled light source

Abstract

The invention discloses a quantum communication networking method and system based on a multi-wavelength channel aliasing entangled light source. The method comprises: generating a plurality of parallel and mutually independent spontaneous nonlinear effects through a multi-pump nonlinear medium, namely constructing a plurality of broadband entangled light sources in the same nonlinear medium, wherein output spectra of the entangled light sources have certain aliasing (such light sources are named as aliasing entangled light sources); performing wavelength channel configuration on the entangledsingle photons by using a relatively mature dense wavelength division multiplexing technology in a classical optical fiber communication system; and constructing a quantum network server independentof each user and distributing the entangled photons of various wavelengths to each user so as to ensure that every two users share at least one pair of independent entangled single photons. The entangled photon sharing can be achieved through wavelength channel natural aliasing and manual configuration, and therefore the quantum communication network which is high in wavelength channel utilizationrate, capable of achieving multi-user arbitrary interconnection and flexible and adjustable in structure is achieved.

Description

technical field [0001] The invention belongs to the fields of nonlinear optics, fiber optics, and quantum communication, and specifically refers to a method of using multi-pump spontaneous nonlinear effects to realize broadband entangled single photon output with wavelength channel aliasing characteristics, and to perform wavelength processing through a dense wavelength division multiplexing system. The channel configuration realizes the quantum communication networking technology of multi-user arbitrary interconnection. Background technique [0002] Quantum communication technology, based on the Heisenberg uncertainty principle, the principle of non-replicating quantum states, and the principle of inseparable quantum states, is currently recognized as a disruptive communication technology with extremely high security attributes under the "one-time pad" working mode . In the past 30 years, quantum communication technology has achieved a series of research results, including...

AI Technical Summary

Problems solved by technology

[0003] The current quantum communication system generally follows the point-to-point working mode. When building a large-scale quantum communication network with a complex structure, a large number of terminal devices are required. The operation efficiency of the backbone network nodes is relatively low, which seriously restricts the network scale, operating efficiency and flexibility of the quantum communication network. Controllable operation and maintenance capabilities

At this stage, the quantum communication network based on the point-to-point quantum communication system faces huge resource overhead; the multicast quantum communication system cannot achieve arbitrary interconnection of multiple users; the problem of long-term storage of quantum states in the quantum relay communication network technology solution has not been completely solved; Burt Space Quantum Communication Network Technology Solution Work Flexibility and Networking Efficiency Worrying

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