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High-signal-to-noise-ratio broadband balance zero-beat detector for quantum random number generation

A quantum random number, high signal-to-noise ratio technology, which is used in photometry using electrical radiation detectors, devices and instruments with multiple detectors, etc., can solve the problem of low signal-to-noise ratio, narrow bandwidth, and quantum random number security and low yield, to achieve the effects of increased security and production rate, increased bandwidth, and reduced noise figure

Pending Publication Date: 2021-07-20
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the problems of low security and yield of quantum random numbers caused by the low signal-to-noise ratio and narrow bandwidth of the balanced zero-beat detector in the existing quantum random number generator, the present invention proposes a method suitable for quantum random number generation High SNR Broadband Balanced Zero-Beat Detector

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  • High-signal-to-noise-ratio broadband balance zero-beat detector for quantum random number generation
  • High-signal-to-noise-ratio broadband balance zero-beat detector for quantum random number generation
  • High-signal-to-noise-ratio broadband balance zero-beat detector for quantum random number generation

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than All the embodiments; based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

[0024] Such as figure 1 As shown, a high-SNR broadband balanced zero-beat detector suitable for quantum random number generation can be used to amplify the microscopic noise fluctuation detection of the quadrature component of the continuous variable quantum state to the photocurrent signal at the macroscopic level, and can also The incident light power of the two photodiodes is monitored. It includes a p...

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Abstract

The invention relates to the technical field of quantum random number generators, in particular to a high-signal-to-noise-ratio broadband balance zero-beat detector for quantum random number generation, which comprises a light current generation circuit, a two-stage amplification circuit and a direct current signal amplification circuit, wherein the anode of a first photodiode in the photocurrent generating circuit is connected with the cathode of a second photodiode, the cathode of the first photodiode is connected with positive voltage, and the anode of the second photodiode is connected with negative voltage; in the two-stage amplification circuit, the first stage and the second stage respectively focus on low noise coefficient and high gain amplification; the direct-current signal amplification circuit is a proportional amplification circuit, the input end of the direct-current signal amplification circuit is connected with the anode of the first photodiode, and the output end of the direct-current signal amplification circuit is connected with the direct-current output port. According to the method, the signal-to-noise ratio of the detector is greatly improved, enough gain is guaranteed, the method is suitable for efficient extraction of the quantum entropy content in continuous variable quantum random number generation, and the method has a good application prospect in the field of quantum random number generators.

Description

technical field [0001] The invention relates to the technical field of quantum random number generators, in particular to a broadband balanced zero-beat detector with high signal-to-noise ratio for quantum random number generation. Background technique [0002] The method of generating random numbers based on the fluctuation uncertainty of continuous variable quantum state components has become a quantum random number generation scheme with good application prospects due to its advantages such as clear model, high bandwidth, strong robustness, and chip integration. The balanced zero-beat detector can reliably extract the noise fluctuation of the quantum quadrature component of the continuous variable quantum state. Used in quantum random number generators. The signal-to-noise ratio of the balanced zero-beat detector directly affects the quantum noise entropy content of the continuous variable quantum random number, and its bandwidth directly determines the bandwidth of the ...

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Application Information

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IPC IPC(8): G01J1/42G01J1/44
CPCG01J1/4228G01J1/44G01J2001/442G01J2001/446G01J2001/444
Inventor 郭晓敏蔡少卓邓娟郭龑强
Owner TAIYUAN UNIV OF TECH
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