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

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...

AI Technical Summary

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 detection device are used, so the rate of establishing entanglement at both ends of the basic link is low. The rate and fidelity of qubit transfer in the channel is still not high

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