Frequency domain multiplexing quantum channel basic link of optical fiber communication waveband

A fiber optic communication and basic link technology, applied in the field of quantum information, can solve the problems of low entanglement rate, qubit transmission rate and fidelity, etc., and achieve the effect of easy assembly and improved transmission rate and fidelity

Active Publication Date: 2020-06-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0003] In the current implementation scheme of the basic link of the quantum channel, the frequency-domain single-mode entanglement light source and the single-channel Bell state

Method used

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  • Frequency domain multiplexing quantum channel basic link of optical fiber communication waveband
  • Frequency domain multiplexing quantum channel basic link of optical fiber communication waveband
  • Frequency domain multiplexing quantum channel basic link of optical fiber communication waveband

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Embodiment Construction

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0028] Such as figure 1 As shown, the basic link of a frequency-domain multiplexing quantum channel in the optical fiber communication band provided by the embodiment of the present invention includes a first multi-channel quantum memory 1, a second multi-channel quantum memory 7, and a first frequency-domain broadband entanglement light source 2 , the second frequency-domain broadband entanglement light source 6 and multi-channel Bell state measuring device; the multi-channel Bell state measuring device includes a first dense wave demultiplexer 3, a second dense wave demultiplexer 5, a fiber coupler 4 , n pairs of single photon detectors 81, 91, 82, 92...8n, 9n, n is a positive integer, and n logical circuits 101, ...

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Abstract

The invention relates to a frequency domain multiplexing quantum channel basic link of an optical fiber communication waveband. An entangled photon pair is output at a high speed by adopting a frequency domain broadband entangled light source; secondly, establishing entanglement of a photon-quantum memory at a high speed through a storage effect of the multichannel quantum memory on photons of a plurality of frequency channels; establishing quantum entanglement among the multi-channel quantum memories at a high speed in a declaring form through a multi-channel Bell state measuring device; andfinally, according to a multi-channel Bell state measurement result, the multi-channel quantum memory can output entangled photon pairs with the same frequency at a high speed, so that the fidelity and the transmission rate of quantum bit transmission in a quantum channel can be improved. All devices used in the invention can be from mature photoelectronic devices, which is beneficial to system assembly preparation and practical development, and the whole device has the characteristics of easy assembly, miniaturization, practicability and integration of optical fiber devices.

Description

technical field [0001] The invention belongs to the field of quantum information, and in particular relates to a frequency-domain multiplexing quantum channel basic link in an optical fiber communication band. Background technique [0002] Quantum channels connect quantum nodes or quantum computers at the full quantum information level, which is the key to building future quantum networks. High-fidelity, high-speed transmission of qubits is the core task of constructing quantum channels, which is mainly realized through technologies such as quantum entanglement distribution and quantum teleportation. Photons with wavelengths in the optical fiber communication band have relatively small losses when transmitted in optical fibers, so optical fibers are an important medium for photon transmission in current quantum channel research. Although in the metropolitan area, fiber loss has not yet had a significant impact on quantum entanglement distribution, but when the fiber connect...

Claims

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Application Information

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IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 周强席琪袁晨智邓光伟宋海智王浟
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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