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Phase detection method of cold atom Bose-Einstein condensation vortex superposed-state gyroscope

A technology of vortex superposition and phase detection, which is applied in the field of over-precision inertial navigation, and can solve problems such as affecting system detection accuracy and loss of interference pattern information

Active Publication Date: 2017-06-20
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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Problems solved by technology

For the cold atom BEC vortex superposition state, if this method is used, the entire interference pattern information will inevitably be lost, thus affecting the detection accuracy of the system

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  • Phase detection method of cold atom Bose-Einstein condensation vortex superposed-state gyroscope

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Embodiment Construction

[0067] specific implementation plan

[0068] The implementation object of the present invention is a vortex superposition gyroscope based on cold atom BEC, and the schematic diagram of the specific implementation is as follows figure 1 As shown, the specific implementation steps are as follows:

[0069] The vortex superposition gyroscope based on cold atom BEC (such as Figure 5 ) is to use the Sagnac effect of the vortex superposition matter wave to realize the sensitivity to the angular rate. Therefore, after generating a stable interference pattern, it is necessary to detect the phase information of the interference pattern to obtain the angular velocity of the system.

[0070] Through the transfer of orbital angular momentum of superposition vortex light, a stable vortex superposition state matter wave can be formed in the BEC, resulting in a stable standing wave. The standing wave is reflected in the density distribution of cold atoms, that is, the density distributio...

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Abstract

The invention relates to a phase detection method of a cold atom Bose-Einstein condensation vortex superposed-state gyroscope. Superposed-state vortex light is emitted into a Bose-Einstein condensation state gas atom cluster to enable the Bose-Einstein condensation (BEC) atom cluster to obtain a certain orbital angular momentum, and stable vortex superposed-state matter waves are generated; the BEC atom cluster in a potential well is equivalent to a matter wave interference gyroscope. Atom density distribution of the BEC forms a stable gyroscope pattern; when the system rotates at a certain angular speed, a certain phase is generated due a Sagnac effect; each atom has a fixed scattering effect on photons; after detection light is added, a whole resonance absorption image is detected through a charge coupled device (CCD) and scattering light intensity is calculated through space calculation and time calculation; density distribution of the BEC atom cluster is reckoned so as to obtain phase information; relative light intensity change can be obtained through space subtraction, is used as a gyroscope signal and is used for reckoning a system angular speed, so that the sensitivity on the system angular speed is realized.

Description

technical field [0001] The invention relates to a phase detection method of a cold atom Bose-Einstein condensed vortex superposition gyroscope, which can be applied to the field of inertial navigation with exceeding precision. [0002] technical background [0003] In 1850, in order to study the rotation of the earth, the French physicist J·Foucault first discovered that the rotating axis of the high-speed rotating rotor always points to a fixed direction due to inertia, and named it a gyroscope. As the main inertial navigation detection equipment, gyroscopes are widely used in navigation, aviation, aerospace, missiles and other fields, and have very important strategic significance for the development of a country's industry, national defense and other high-tech fields. Due to the limitations of the traditional electromechanical gyroscope, the accuracy and sensitivity have entered the bottleneck. There are contradictions between the improvement of the accuracy and sensitivit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/58
CPCG01C19/58
Inventor 任元汤国志王如泉谢璐成蕊汪洲王卫杰刘通
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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