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A continuous variable entanglement distillation device between atomic ensembles

A technology of atomic ensemble and distillation device, applied in optical components, instruments, optics, etc., can solve problems such as improvement of atomic ensemble entanglement, high cost of atomic entanglement preparation, destruction of quantum entanglement, etc., and achieve the effect of improving quality

Active Publication Date: 2020-06-12
SHANXI UNIV
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Problems solved by technology

[0004] The above research work has realized the quantum purification of atomic ensembles and solved the problem of improving the entanglement between atomic ensembles. However, once the purification operation fails in the above method, the quantum entanglement between atoms will be destroyed, and atomic entanglement needs to be re-prepared many times. To be used for entanglement purification, there is a technical problem of high cost of atomic entanglement preparation

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  • A continuous variable entanglement distillation device between atomic ensembles
  • A continuous variable entanglement distillation device between atomic ensembles
  • A continuous variable entanglement distillation device between atomic ensembles

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[0026] The present invention will be further described below in conjunction with the accompanying drawings. The EPR entangled light source in this article refers to the Einstein-Podolsky-Rosen (Einstein-Podolsky-Rosen) entangled light source.

[0027] Such as figure 1As shown, a continuous variable entanglement distillation device between atomic ensembles in this embodiment includes a light source unit 1, a first fiber channel 21, a second fiber channel 22, a first optical chopper 31, a second optical A chopper 32, a first atomic system 41, a second atomic system 42 and a measurement system 5; the light source unit 1 is provided with two local oscillator optical signals a L1 and a L2 The output terminal of the probe, the two-way probe light pulse signal a P1 and a P2 The output terminal, two control optical pulse signals a C1 and a C2 The output end of the probe light pulse signal a of the light source unit 1 P1 and a P2 The output ends of the first optical fiber chann...

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Abstract

The invention relates to a continuous variable entanglement distillation device between atomic ensembles, which belongs to the technical field of continuous variable entanglement distillation. The continuous variable entanglement distillation device with good reliability and easy implementation provided by the invention is characterized by comprising a light source unit, first and second optical fiber channels, first and second optical choppers, first and second atomic systems, and a measurement system, wherein the light source unit is connected with input ends of the first and second opticalfiber channels respectively, an output end of the first optical fiber channel is connected with an input end of the first optical chopper, an output end of the second optical fiber channel is connected with an input end of the second optical chopper, an output end of the first optical chopper is connected with a first input end of the first atomic system, an output end of the second optical chopper is connected with a first input end of the second atomic system, the light source unit is connected with second input ends of the first and second atomic systems respectively, an output end of the first atomic system is connected with a first input end of the measurement system, an output end of the second atomic system is connected with a second input end of the measurement system, and the light source unit is connected with third and fourth input ends of the measurement system respectively. The continuous variable entanglement distillation device can be used in the field of quantum information.

Description

technical field [0001] The invention relates to a continuous variable entanglement distillation device between atomic ensembles, which belongs to the technical field of continuous variable entanglement distillation. Background technique [0002] In the development of quantum information science, quantum network is one of the current research hotspots. Quantum networks can consist of optical quantum channels and atomic quantum nodes. Among them, light is an ideal carrier for long-distance transmission of quantum information, and can be used to realize the interconnection between quantum nodes; atomic ensembles are one of the effective media for quantum nodes due to their advantages of large optical thickness and good coherence. The storage and processing of quantum information can be realized. Quantum entanglement can not only be used to study the basic problems of quantum mechanics, but also is the core resource for realizing quantum information. However, the effect of en...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B27/00
CPCG02B27/00G02B27/106
Inventor 闫智辉贾晓军刘艳红闫捷利彭堃墀
Owner SHANXI UNIV
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