Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for detecting quantum communication systems

A technology of quantum communication and single-photon detector, applied in the field of quantum communication, can solve problems such as affecting the coding rate of the system, and achieve the effect of preventing the increase of the error rate

Active Publication Date: 2021-08-13
QUDOOR TECH INC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the interference effect of the unequal arm interferometer will significantly affect the error rate in the quantum key distribution system, the interference effect of the unequal arm interferometer used in the quantum key distribution system will directly affect the quantum key distribution system. Error rate, which in turn affects the coding rate of the system

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
  • Method and apparatus for detecting quantum communication systems
  • Method and apparatus for detecting quantum communication systems
  • Method and apparatus for detecting quantum communication systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] figure 1 A flowchart of a method for detecting a quantum communication system according to an exemplary embodiment of the present invention is shown.

[0027] refer to figure 1 , figure 1 The illustrated method may include the following steps.

[0028] In step 101, the first background count detected in the first single photon detector connected to the output end of the scalene interferometer can be obtained without inputting an optical pulse to the scalene interferometer and the The second background count detected in the second single photon detector connected to the output end of the equi-arm interferometer.

[0029] Here, the background counting refers to the single photon counting at each delay position (or time position) detected from the single photon detector under the condition that no light pulse is input, wherein the first ba...

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 present invention provides a method and apparatus for detecting a quantum communication system, the method comprising: acquiring a first background count detected in a first single photon detector and a second single photon detector in the absence of an input optical pulse the second background count detected in ; the adjacent two first peak counts detected in the first single-photon detector and the adjacent two first peak counts detected in the second single-photon detector in the case of an input light pulse The two second peak counts of ; the first difference between the two arm insertion loss values ​​of the unequal arm interferometer is derived from the first background count and the first peak count and the second background count and the second peak count, respectively and a second difference; encoding and / or decoding using the unequal arm interferometer in response to the difference between the first difference and the second difference reaching a system design threshold. The method and device provided by the invention can detect the unequal interferometer used in the quantum communication system without adding new investment.

Description

technical field [0001] The present invention relates to the technical field of quantum communication, in particular to a method and device for detecting a quantum communication system (such as a quantum key distribution system). Background technique [0002] At present, three encoding methods, polarization encoding, phase encoding and time phase encoding, are mainly used in the quantum key distribution system. Among them, phase encoding and time phase encoding both need to use unequal arm interferometers for encoding and decoding. Since the interference effect of the unequal arm interferometer will significantly affect the error rate in the quantum key distribution system, the interference effect of the unequal arm interferometer used in the quantum key distribution system will directly affect the quantum key distribution system. Error rate, which in turn affects the coding rate of the system. Contents of the invention [0003] The object of the present invention is to pr...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04B10/70H04L9/08G01J9/02G01J1/44
CPCG01J1/44G01J9/02G01J2001/442H04B10/0795H04B10/70H04L9/0852
Inventor 陈柳平王其兵万相奎王林松范永胜
Owner QUDOOR TECH INC