A continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter

A technology of enhancing devices and beam splitters, applied in nonlinear optics, safety communication devices, instruments, etc., can solve problems such as inability to deal with, inability to handle coherence manipulation, and reports of no strong entanglement coherence enhancement, so as to overcome amplitude Effects of attenuating noise, enhancing coherence, and improving coherence quality

Active Publication Date: 2022-05-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, due to the limitation in photon number processing, this scheme cannot deal with the problem of multi-photon population when inputting strong entanglement in the future, and cannot handle coherence manipulation under strong entanglement conditions.
At the same time, up to now, there are still no reports on the enhancement of strong entanglement coherence at home and abroad

Method used

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  • A continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter
  • A continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter
  • A continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0027] see figure 1 , figure 1 This is a schematic diagram of the first nonlinear beam splitter-based continuous variable strong entanglement coherence enhancement device 100 provided in the embodiment of the present application.

[0028] In this embodiment, the continuous variable strongly entangled coherence enhancement device 100 based on a nonlinear beam splitter may include a light source unit 110, a first photon detector 121, a first free-space optical channel 131, a first optical mirror 141, The first optical nonlinear beam splitter 151 and the third photon detector 123 .

[0029] see figure 2 , figure 2This is a schematic structural diagram of the light source unit 110 in the first nonlinear beam splitter-based continuous variable strongly entangled coherence enhancement d...

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Abstract

The application provides a continuous variable strong entanglement coherence enhancement device based on a nonlinear beam splitter, including: a light source unit, including an EPR strong entanglement light source and an EPR first weak entanglement light source, the EPR strong entanglement light source is provided with an output terminal A, EPR The first weakly entangled light source is provided with a first output end and a second output end; the first photon detector is connected to the first output end; the first free space optical channel has an input end M1 and an output end N1, and the input end M1 and the output end A connection; the first optical mirror has an input terminal P1 and an output terminal Q1, and the input terminal P1 is connected to the second output terminal; the first optical nonlinear beam splitter has an input terminal X1, an input terminal X2, an output terminal Y1, The output terminal Y2, the input terminal X1 is connected to the output terminal N1, the input terminal X2 is connected to the output terminal Q1, wherein the output terminal Y2 is used to output one of the modes of the two-mode entangled state; the third photon detector is connected to the output terminal Y1 .

Description

technical field [0001] The present application relates to the technical field of continuous variable entanglement manipulation, and in particular, to a continuous variable strong entanglement coherence enhancement device based on a nonlinear beam splitter. Background technique [0002] Quantum entanglement is an important resource in quantum information. At present, the quantum entanglement that everyone is concerned about can be divided into discrete variable quantum entanglement and continuous variable quantum entanglement. Discrete variable quantum entanglement is mostly manifested in the quantum entanglement of few-level quantum systems, including atomic entanglement and photon entanglement. The continuous variable quantum entanglement is a new form of quantum state entanglement with the canonical coordinate component and canonical momentum component of the quantum light field as the main body. Continuous variable quantum entangled states have important applications in...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04B10/70H04L9/08G02F1/35
CPCH04B10/70H04L9/0852G02F1/35
Inventor张胜利
OwnerBEIJING INSTITUTE OF TECHNOLOGYGY