Research articles
ScienceAsia 51S (2025):ID 2025025 1-7 |doi:
10.2306/scienceasia1513-1874.2025.s025
Monotonic manipulation of atomic density in an isovolumetric
focused-beam trap for quantum atom experiments
Nuttanan Tanasanchaia,c, Kritsana Srakeawa, Parinya Udommaia,b,*, Waranont Anukoola
ABSTRACT: We present an asymmetric focused-beam trap (FBT) of cold Rubidium-85 atoms. Unlike the cold atom
preparation using the magneto-optical trap, the FBT has its path of cooling beam occupying only one axis. Since
the experiments on these cold atoms usually require additional laser beams or other atom interacting sources, the
FBT allows more optical and physical accessibility for these experiments. In our experiment, the cooling beams only
occupied one axis, and the crossed repumping beams were in the transverse plane to the cooling beams. By varying
the intensity of the repump laser, we have shown that the atomic cloud density can be monotonically manipulated
from zero to the maximum value limited by the cooling power. With this monotonic control, we then computationally
introduced a scheme for the precision loading of 1?6 atoms into the far-off-resonance optical dipole trap (FORT). Using
the FBT for precision FORT loading could enable extensions toward the research areas, such as Rydberg atom, quantum
simulation, and quantum computing.
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| a |
Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200 Thailand |
| b |
Office of Research Administration, Chiang Mai University, Chiang Mai 50200 Thailand |
| c |
Thailand Center of Excellence in Physics, Commission on Higher Education, Bangkok 10400 Thailand |
* Corresponding author, E-mail: parinya.udommai@cmu.ac.th
Received 17 Dec 2024, Accepted 0 0000
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