Clock synchronization system and method based on quantum entanglement

A clock synchronization and quantum entanglement technology, applied in the field of quantum information and optical communication, can solve the problems of difficult alignment between satellites and ground stations, large photon attenuation, etc., to improve the clock synchronization accuracy, reduce the impact, and avoid the effect of precision degradation.

Active Publication Date: 2019-03-29
GUANGDONG INCUBATOR TECH DEV CO LTD
View PDF7 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Patent 201120311727.3 proposed the use of quantum entanglement to realize the time synchronization of Beidou satellites, but the attenu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Clock synchronization system and method based on quantum entanglement
  • Clock synchronization system and method based on quantum entanglement
  • Clock synchronization system and method based on quantum entanglement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the patent.

[0038] In order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0039] For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.

[0040] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] Such as Figure 1-7 A clock synchronization system based on quantum entanglement is shown, including an entanglement source unit 1', a transmission unit 2', a clock synchronization unit Alice3', a clock synchronization unit Bob-4' and a measurement unit 5'. The various units are connected by optical fibers, wherein:

[0042] The entanglement source unit 1' includes a pump laser 10...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a clock synchronization system and method based on quantum entanglement. The system includes an entanglement source unit, a transmission unit, a clock synchronization unit Alice, a clock synchronization unit Bob and a measurement unit. According to the system, entangled photons of a single polarization state are employed as synchronization signal carriers, and Faraday mirrors and bidirectional paths are utilized to realize automatic compensation of polarization jitters in optical fiber, frequency-approximated entangled photon pairs are formed by a 790nm laser-pumped type-II phase-matched crystal, and delay time of the two optical paths is precisely controlled through an electrically controllable optical delay line, a maximum value of an HOM sag between the two partsof to-be-carried-out clock synchronization is obtained, thus accurate time difference with a benchmark as an intermediate unit is obtained, and then clock synchronization of the two parts is realizedthrough direct measurement of the entangled photons.

Description

technical field [0001] The present invention relates to the technical field of quantum information and optical communication, and more specifically, to a clock synchronization system and method based on quantum entanglement. Background technique [0002] Time (frequency) is one of the most basic physical quantities for people to understand nature. In 1967, the Thirteenth International Conference on Weights and Measures decided that in the International System of Units (SI), the time unit second (S) is defined as: 133 C S Duration of 9192631770 periods of transition radiation between two hyperfine energy levels of the atomic ground state. Because time is currently the basic physical quantity with the highest measurement accuracy, other physical quantities are often converted into time frequency and then measured. For example, the length of a meter is defined as the distance traveled by light in a vacuum within a time interval of 1 / 299793458 seconds. [0003] In the field of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04J3/06H04B10/70
CPCH04B10/70H04J3/0644H04J3/0682
Inventor 郭邦红胡敏
Owner GUANGDONG INCUBATOR TECH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap