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A controllable OAM quantum invisible state transfer system and method based on a W state

A teleportation and quantum technology, which is applied in the field of controllable OAM quantum teleportation system, can solve the problems that cannot be applied in the field of quantum communication, the transmission distance of the quantum state teleportation scheme, the communication quality and the limitation of anti-interference ability, etc., to achieve Strong entanglement characteristics and ability to resist bit loss, improve communication security, and reduce noise

Active Publication Date: 2019-05-03
GUANGDONG INCUBATOR TECH DEV CO LTD
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Problems solved by technology

However, because the quantum state teleportation scheme is still greatly limited in terms of transmission distance, communication quality and anti-interference ability, as a brand-new communication method, it still cannot be applied in the actual quantum communication field.

Method used

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  • A controllable OAM quantum invisible state transfer system and method based on a W state
  • A controllable OAM quantum invisible state transfer system and method based on a W state
  • A controllable OAM quantum invisible state transfer system and method based on a W state

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Embodiment 1

[0060] A controllable OAM quantum teleportation system based on W state, such as figure 1 with figure 2 As shown, it includes: including Alice end and Bob end, Alice end includes: hybrid entanglement unit, entanglement exchange unit 4, Path analysis unit 6 and SAM analysis unit 7, Bob end includes OAM analysis unit 5; hybrid entanglement unit includes: SAM- OAM hybrid entanglement subunit 1, SAM-Path hybrid entanglement subunit 2 and SAM-SAM hybrid entanglement subunit 3.

[0061] Specifically, the SAM-OAM hybrid entanglement subunit 1 includes a first pump source, a first prism 101, a first BBO crystal 102, a first total reflection mirror 103 and a second total reflection mirror 104 arranged in sequence, the first total reflection A first half-wave plate 105, an OAM generator 106, and a first single-mode optical fiber 107 are arranged in sequence on the reflection side of the mirror 103. Wherein, the first total reflection mirror and the second total reflection mirror are ...

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Abstract

The invention discloses a controllable OAM quantum invisible state transfer system based on a W state. the system comprises an Alice sending end and a Bob receiving end. Alice comprises a mixed entanglement unit, an entanglement exchange unit, a Path analysis unit and an SAM analysis unit. the Bob comprises an OAM analysis unit. The Entanglement exchange unit is used for Performing entanglement exchange on the SAM- OAM entangled photon pair, SAM- Path entangled photon pair and SAM-SAM entanglement photon pairs to obtain two W states which are equal in probability and symmetrical to each other,and randomly selecting one W state as a quantum channel; The OAM analysis unit is used for OAM analysis, and Alice can remotely control OAM generation of Bob photons through electric field tuning. The method is an open type target invisible transmission state, an asymmetric light quantum network can be formed, remote control, high-dimensional, expandable and safer quantum invisible transmission state can be realized, and the method has a great application prospect.

Description

technical field [0001] The invention belongs to the field of quantum information and quantum communication, and in particular relates to a controllable OAM quantum teleportation system based on a W state. Background technique [0002] Quantum teleportation is an important communication method. In quantum teleportation, two communication parties in two distant places share a pair of entangled particles. One party measures the Bell state of the particle to be transmitted in the quantum state and the entangled particle in its own hand, and then informs the other party of the measurement result, and the other party Then perform the corresponding unitary operation according to the obtained information. In 1993, Bennett and others proposed the concept of quantum teleportation for the first time. In 1997, Bouwmeester et al. used entangled photon pairs as quantum channels for the first time to achieve experimental success, revealing the possibility of transmitting quantum states w...

Claims

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Application Information

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IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 郭邦红曾炎颖
Owner GUANGDONG INCUBATOR TECH DEV CO LTD
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