Continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter

A technology of enhancing devices and beam splitters, applied in nonlinear optics, secure communication devices, instruments, etc., can solve problems such as inability to handle coherence manipulation, inability to deal with, and reports of no strong entanglement coherence enhancement, to achieve enhanced coherence The effect of overcoming amplitude attenuation noise and improving the quality of coherence

Active Publication Date: 2021-11-30
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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  • Continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter
  • Continuous variable strong entanglement coherence enhancement device based on nonlinear beam splitter
  • 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 drawings in the embodiments of the present application.

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

[0028] In this embodiment, the continuous variable strong entanglement 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 2A schematic structural diagram of the light source unit 110 in the first non-linear beam splitter-based continuous variable strong entanglement coherence enhancement device 100 provided ...

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Abstract

The invention provides a continuous variable strong entanglement coherence enhancement device based on a nonlinear beam splitter, and the device comprises a light source unit which comprises an EPR strong entanglement light source and an EPR first weak entanglement light source, wherein the EPR strong entanglement light source is provided with an output end A, and the EPR first weak entanglement light source is provided with a first output end and a second output end; a first photon detector which is connected with the first output end; a first free space optical channel which is provided with an input end M1 and an output end N1, wherein the input end M1 is connected with the output end A; a first optical reflector which is provided with an input end P1 and an output end Q1, wherein the input end P1 is connected with the second output end; a first optical nonlinear beam splitter which is provided with an input end X1, an input end X2, an output end Y1 and an output end Y2, wherein the input end X1 is connected with the output end N1, the input end X2 is connected with the output end Q1, and the output end Y2 is used for outputting one mode of the two-mode entangled state; and a third photon detector which is connected with the output end Y1.

Description

technical field [0001] The present application relates to the technical field of continuous variable entanglement manipulation, and in particular, relates 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 cares about can be divided into discrete variable quantum entanglement and continuous variable quantum entanglement. Quantum entanglement of discrete variables is mostly manifested in the quantum entanglement of quantum systems with few energy levels, including atomic entanglement and photon entanglement. The continuous variable quantum entanglement is a new form of quantum state entanglement in which the canonical coordinate component and the canonical momentum component of the quantum light field are the main body. Continuously variable quantum entangled states h...

Claims

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Application Information

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