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Method for acquiring unknown information by using quantum technology

A quantum technology and quantum technology, applied in the field of obtaining unknown information by using quantum technology, can solve the problems of loss of quantum effects, high cost of quantum entanglement preparation, and reduced precision, and achieve the effect of low preparation cost

Inactive Publication Date: 2019-07-12
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The preparation cost of quantum entanglement in this parameterization process is high, and because the quantum system inevitably interacts with the surrounding environment, the quantum effect will be irreversibly lost, which greatly reduces the accuracy of this parameterization process.

Method used

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  • Method for acquiring unknown information by using quantum technology
  • Method for acquiring unknown information by using quantum technology
  • Method for acquiring unknown information by using quantum technology

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the technical solution of the present invention, and are not intended to limit the technical solution of the present invention.

[0033] see figure 1 , an embodiment of the present invention provides a method of using quantum technology to obtain unknown information, the method comprising:

[0034] Step S100, preparing an initial state of a single quantum system.

[0035] Specifically, the single quantum system can be electrons or photons. If the single quantum system is an electron, the initial state of the single quantum system can be prepared as spin-up or spin-down as required. If the single quantum system is a photon, the po...

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Abstract

The invention provides a method for acquiring unknown information by using a quantum technology. The method comprises the following steps: preparing an initial state of a single quantum system; putting the single quantum system into an unknown information system through kth preset quantum operation so as to parameterize the single quantum system into a parameterized quantum system; measuring the parameterized quantum system to obtain the current actually measured quantum state of the parameterized quantum system; measuring the parameterized quantum system through theoretical quantum measurement operation to obtain the current theoretical quantum state of the parameterized quantum system; if the current actual measurement quantum state is different from the current theoretical quantum state, obtaining an average deviation of an observation error to observation precision, the average deviation being an average deviation of k times of the current actual measurement quantum state and the current theoretical quantum state; and if the average deviation is smaller than a preset error, obtaining the current quantum state of the parameterized quantum system through an imperfect quantum detection method.

Description

technical field [0001] The invention relates to the technical field of quantum information, in particular to a method for obtaining unknown information by using quantum technology. Background technique [0002] Quantum metrology, also known as quantum parameter estimation, mainly studies how to use quantum means to improve the accuracy of parameter estimation, which has important research significance both experimentally and theoretically. Quantum metrology has become an important topic in research fields such as atomic clocks, quantum frequency standards, quantum lithography, quantum positioning, quantum imaging and gravitational wave detection. [0003] The quantum measurement technology in the traditional technology mostly adopts parallel parameterization protocol, that is, multiple quantum systems in the entangled state are used as the detection state and go through the dynamic evolution process depending on the parameters to be estimated, and use the quantum effect betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/00
CPCG06F19/00
Inventor 宋洪婷陈亮袁帅王成
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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