Quantum key distribution system and transmitting end, receiving end and communication method thereof

A quantum key distribution and transmitter technology, applied to key distribution, can solve the problems that the coding rate cannot meet the communication requirements, limit the wide application of QKD system, and the coding rate is not high enough

Active Publication Date: 2020-10-09
QUANTUMCTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The coding rate of the existing QKD system is not high enough. For example, under the condition of long-distance communication, the coding rate of the current QKD system cannot meet the communication requirements, which greatly limits the wide application of the QKD system.

Method used

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  • Quantum key distribution system and transmitting end, receiving end and communication method thereof
  • Quantum key distribution system and transmitting end, receiving end and communication method thereof
  • Quantum key distribution system and transmitting end, receiving end and communication method thereof

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Embodiment Construction

[0107] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0108] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0109] Using high-dimensional coding quantum communication is an important method to improve the coding rate of QKD system. In a conventional QKD system, information is encoded in a two-dimensional Hilbert space (...

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Abstract

The invention discloses a QKD system and a transmitting end, a receiving end and a communication method thereof. In the technical scheme of the invention, the transmitting end can carry out polarization and phase modulation on an optical pulse, coding in a preset four-dimensional space is realized, the optical pulse comprising polarization information and time information is emitted, and the receiving end can acquire the optical pulse emitted by the transmitting end, carry out polarization and phase decoding on the optical pulse and detect the optical pulse. Visibly, the technical scheme of the invention can realize high-dimensional coding quantum communication, so that one quantum state can carry more bit information, and the code forming rate of the QKD is greatly improved.

Description

technical field [0001] The invention relates to the technical field of quantum secure communication, and more specifically, to a quantum key distribution system, a transmitting end, a receiving end and a communication method thereof. Background technique [0002] Quantum Key Distribution (Quantum Key Distribution, QKD) technology can generate a completely consistent unconditional security key between the two parties in communication, so it has attracted extensive attention. Since the proposal of the BB84 scheme in 1984, various theoretical schemes have been perfected day by day, and the technical realization has gradually matured and moved towards practical application. The fundamental difference between Quantum Key Distribution (QKD) and the classical key system is that it uses a single photon or entangled photon pair as the carrier of the key, which is based on the three basic principles of quantum mechanics (Heisenberg’s uncertainty principle, Measurement collapse theory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/516H04B10/524H04B10/532H04B10/556
CPCH04L9/0858H04B10/70H04B10/524H04B10/532H04B10/5561H04B10/5161
Inventor 唐世彪李东东汤艳琳
Owner QUANTUMCTEK
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