Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 18: Trapping and Cooling of Atoms (joint session Q/A)

Q 18.2: Vortrag

Dienstag, 12. März 2024, 11:30–11:45, HS 1221

Using multifrequency light for large cold atom traps — •David Johnson, Ben Hopton, Nathan Cooper, and Lucia Hackermüller — University of Nottingham, Nottingham, UK

Magneto-optical trapping (MOT) and Bose-Einstein-Condensates (BECs) are used for a wide range of applications, such as sensors for magnetic or gravitational fields, as well as to test fundamental questions such as Quantum Gravity. Larger atom clouds would allow for more precise sensors and test a larger range of parameters of such theories. One limitation to the size of the trapped cold atom cloud is the range of atom velocities that can be addressed by the trapping beams. By using multiple frequencies each shifted by approximately 5MHz, we expect an increase of the atom loading rate by a factor of 1000 or more, thus leading to trapping 10-100 times more atoms in our MOT. A dark spot MOT can be used to reduce the influence of collisional losses and fully demonstrate the feasibility of our proposal.

Keywords: Quantum sensing; Cooling and Trapping; Fundamental tests