Efficient quantum storage apparatus for continuous variable non-classic light field

Abstract

The invention relates to an efficient quantum storage apparatus for a continuous variable non-classic light field, and mainly solves the technical problem of low quantum storage efficiency of an existing non-classic light field. According to the technical scheme, the efficient quantum storage apparatus for the continuous variable non-classic light field comprises a light source unit, an atomic system and a compression measurement system, wherein the light source unit is provided with a local oscillation light signal aL output end, a probe light pulse signal aP output end and a control light pulse signal aC output end; the probe light pulse signal aP output end is connected with a first input end of the atomic system; the control light pulse signal aC output end is connected with a second input end of the atomic system; the output end of the atomic system is connected with a first input end of the compression measurement system; the local oscillation light signal aL output end is connected with a second input end of the compression measurement system; and the compression measurement system consists of an optical beam splitter, two balanced zero beat detectors, a power subtractor and a digital storage oscilloscope.

Description

technical field [0001] The invention relates to a high-efficiency quantum storage device with continuous variable non-classical light field. It belongs to a device that stores the quantum state of the continuously variable squeezed state light field into the spin wave quantum state of the atomic ensemble, and improves the quantum storage efficiency through an optical resonant cavity. Background technique [0002] With the development of quantum information science, the quantum information network composed of optical quantum channels and atomic quantum nodes is the guarantee for practical applications. Among them, light is an ideal carrier for long-distance transmission of quantum information; atomic ensembles are one of the effective media for realizing quantum nodes due to their advantages of large optical thickness and good coherence, and can realize the storage and processing of quantum information. Therefore, storing the quantum state of light in an atomic ensemble is a...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem of low efficiency of the existing non-classical light field quantum storage, and provide a high-efficiency quantum storage device with continuous variable non-classical light field with good reliability and high storage efficiency

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