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Phase entangled encoding method and device

A technology of phase encoding and encoding device, which is applied in the field of optical transmission and secure communication

Active Publication Date: 2018-10-26
CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to propose a phase entanglement encoding method and device for photon pairs, to solve the problem of phase entangled photon pairs, and to realize the anti-interference and stable transmission of entangled photon pairs in optical fiber channels, and to realize optical fiber Channel quantum entanglement distribution, quantum teleportation, quantum key distribution and other applications

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Examples

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no. 1 example

[0056] The first embodiment of the present invention, a phase entanglement encoding method for photon pairs, such as figure 1 shown, including the following specific steps:

[0057] Step S101: converting the first photon and the second photon in the polarization-entangled photon pair generated by the polarization-entangled light source from polarization encoding to phase encoding; and

[0058] Step S102: forming phase-entangled photon pairs from the two photons converted into phase codes.

[0059] Specifically, a polarization-entangled light source generates a pair of polarization-entangled photons. The polarization state of the polarization-entangled photon pair is a set of orthogonal polarization states. The commonly used orthogonal polarization states are a set of linear polarization states for horizontal and vertical polarization, a set of linear polarization states for 45° and -45° polarization, and a left-handed polarization state. and a set of circular polarization st...

no. 2 example

[0074] In the second embodiment of the present invention, a phase entanglement encoding device for photon pairs, such as figure 2 As shown, it specifically includes the following components: a polarization-entangled light source 201 and two polarization-to-phase encoding devices 202 .

[0075] Wherein, the polarization-entangled light source 201 is used to generate polarization-entangled photon pairs.

[0076] The two polarization-to-phase encoding devices 202 are used to respectively convert the first photon and the second photon in the polarization-entangled photon pair from polarization encoding to phase encoding.

[0077] Specifically, the polarization-to-phase encoding device includes: a polarization beam splitter, a phase encoder, and a beam combiner;

[0078] The polarization beam splitter is configured to split one of the first photon and the second photon in the polarization-entangled photon pair generated by the polarization-entangled light source into photons tran...

no. 3 example

[0090] In the third embodiment of the present invention, a polarization-shift phase encoding device, such as image 3As shown, it specifically includes the following components: a polarization beam splitter 301 , two phase encoders 302 and 305 , two mirrors 303 and 304 , a beam combiner 306 , and a polarizer 307 .

[0091] Any one of the polarization-entangled photon pairs generated by the polarization-entangled light source is input to the polarization beam splitter 301, and the polarization beam splitter 301 splits the two orthogonal polarization states of the incident photons into two sub-optical paths for transmission. After one path is phase-encoded by the phase encoder 302, it is reflected to an input port of the beam combiner 306 by the mirror 303; after the other path is reflected by the mirror 304, it is phase-encoded by the phase encoder 305 and output to the beam combiner 306 another input port. The two sub-optical paths reach the beam combiner 306 synchronously, a...

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Abstract

The invention relates to a phase entangled encoding method for a photon pair and a phase entangled encoding device for the photon pair. The method comprises the steps of: respectively converting a first photon and a second photon in a polarization-entangled photon pair generated by a polarization-entangled light source into phase encoding from polarization encoding; and forming a phase entangled photon pair by the first photon and the second photon converted into the phase encoding. The phase encoding has the advantages of resistance to environment interference and stable transmission in an optical fiber channel; and utilization of the phase entangled encoding device provided by the invention is helpful for implementing application requirements of the optical fiber channel for quantum entanglement distribution, quantum teleportation, quantum key distribution and the like for resistance to environment interference.

Description

technical field [0001] The invention relates to optical transmission secure communication technology in the field of quantum information technology, in particular to a phase entanglement encoding method and device. Background technique [0002] Quantum information is an interdisciplinary research field combining quantum mechanics and classical information theory, and quantum entanglement is a basic core research content of quantum information and even quantum theory. Quantum entanglement plays a vital role in the fields of quantum communication, quantum computing, and quantum sensing. It is the basis for realizing quantum key distribution, quantum teleportation, quantum relay, quantum network, and quantum imaging based on the EPR protocol. Theory and key technologies. [0003] Entangled photon pairs are the most important way to realize quantum entanglement. The interrelated physical quantities in entangled photon pairs are generally polarization (spin angular momentum), or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0819H04L9/0852H04L9/0858H04L63/062
Inventor 许华醒
Owner CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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