Non-adiabatic transferring device of cold atomic group and transferring method thereof

Abstract

The invention provides a non-adiabatic transferring device of a cold atomic group and a method thereof. The non-adiabatic transferring device comprises a vacuum cavity with an atomic source, two pairs of inverse Helmholtz coils, a bias magnetic field coil group, a vacuum pump system, an optical system, a coil current control system based on LabVIEW, and a CCD (Charge Coupled Device) detection system. A magnetic quadrupole trap for transferring the cold atomic group is generated by the two pairs of the inverse Helmholtz coils; and a speed of the center position of the magnetic quadrupole trap at is controlled by changing coil current. According to the non-adiabatic transferring device provided by the invention, a transferring speed of the magnetic quadrupole trap is modulated by modulating the coil current for generating the magnetic quadrupole trap, thereby avoiding the heating effect on the cold atomic group and the excitation of a mass center motion of the cold atomic group. The non-adiabatic transferring device provided by the invention has the characteristics of rapid transferring speed, small energy consumption and no damages on electronic devices.

Description

technical field [0001] The invention relates to cold atomic groups, in particular to a non-adiabatic transfer device and a transfer method for cold atomic groups. Background technique [0002] The transfer of cold atomic groups is an important technique for atomic physics experiments, which enables the application and preparation of cold atoms to be spatially separated. The following two points need to be paid attention to when performing cold atomic group transfer: (1) Avoid the transfer duration being too long. For example, when using a magnetic trap for transfer, the magnetic trap is usually generated by the current in the coil or chip wire. If the time is too long, the system will be affected by the heat generated by the current, and when the current requirement is large, it will damage electronic components. (2) Avoid exciting the motion mode of the center of mass of cold atomic groups. The excitation manifests itself as the center-of-mass oscillation of the cold ato...

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Problems solved by technology

[0007] In order to solve the shortcoming that the adiabatic transfer of cold atomic groups takes too long, and at the same time avoid the excitation of the motion mode of the center of mass of cold atomic groups by rapid non-adiabatic transfer, the present invention provides a non-adiabatic transfer device and method for cold atomic groups. The device and method have the advantages of The transfer speed of the cold atomic group is fast, and it avoids the characteristics of the excitation of the center of mass movement mode of the atomic group

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