Ultra-small phase measurement system and method based on quantum weak measurement

The invention discloses an ultra-small phase measurement system and method based on quantum weak measurement. The system comprises a signal generating device used for generating an initial state of a two-level quantum object, the initial state comprising a pointer state and a system state; an ultra-...

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Bibliographic Details
Main Authors ZHANG YONGSHENG, HU MENGJUN, HU XIAOMIN, LIU BIHENG
Format Patent
LanguageChinese
English
Published 18.08.2017
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:The invention discloses an ultra-small phase measurement system and method based on quantum weak measurement. The system comprises a signal generating device used for generating an initial state of a two-level quantum object, the initial state comprising a pointer state and a system state; an ultra-small phase signal mapping device for mapping an ultra-small phase signal onto the pointer state of the quantum object based on the initial state; a signal processing device for post-selecting the system state of the quantum object to realize amplification of the ultra-small phase signal; an extraction device for extracting the amplified ultra-phase signal under a preset measurement base for the pointer state of the quantum object; and a calculating device for calculating the ultra-small phase signal based on the amplified ultra-small phase signal. The system can be applied to the measurement of an ultra-small phase signal less than 0.1 radian. 本发明公开了种基于量子弱测量的极小相位测量系统以及方法，该极小相位测量系统包括：信号发生装置，所述信号发生装置用于生成二能级量子客体的初始态；
Bibliography:Application Number: CN201710517152