Control method for fast trapping and high-frequency mutual ejection of cold atom groups

A control method for fast trapping and high-frequency mutual ejection of cold atom groups, used for controlling a cold atom interferometer, wherein the cold atom interferometer has two groups of cold atom group ejection mechanisms, the two groups of cold atom group ejection mechanisms eject cold atom groups to each other, each group of cold atom ejection mechanisms comprises:

• an atomic generator, a two-dimensional magneto-optical trap, and a three-dimensional magneto-optical trap, and the two groups of cold atom group ejection mechanisms are disposed opposite to each other, the three-dimensional magneto-optical trap comprises three groups of light sources and three groups of optical stops, wherein the three groups of light sources point to a trapping region, wherein the atomic beam path passing through the trapping region;
• the control method comprises:
• generating atomic beams using the atomic generator;
• cooling the atomic beams using the two-dimensional magneto-optical trap;
• arranging the light sources so that the optical axis of each group of light sources is orthogonal to optical axes of the other two groups of light sources, and the light beams of all of the light sources intersects in a trapping region;
• arranging the atomic generators so that a predetermined angle is formed between the optical path of one of the light sources and path of the atomic beams, wherein the atomic beam path passing through the trapping region;
• arranging the optical stops so that each optical stop is arranged at an edge of optical axis of one light source and partially block laser light emitted from corresponding light source, forming shaded regions in the trapping region,
• ejecting a cold atom group from a first three-dimensional magneto-optical trap along a movement trajectory to a second three-dimensional magneto-optical trap, wherein the movement trajectory passes through the shaded regions of the two three-dimensional magneto-optical traps;
• and
• when it is determined that the cold atom group enters the shaded region of the first three-dimensional magneto-optical trap, trapping a next cold atom group.