Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session K00: Poster Session II (4pm-6pm CDT)
4:00 PM,
Wednesday, June 5, 2024
Room: Hall BC
Abstract: K00.00117 : Transverse Cooling of Cold Caesium Atoms in a Hollow-Core Fiber*
Presenter:
Paul Anderson
(University of Waterloo)
Authors:
Paul Anderson
(University of Waterloo)
Sai Sreesh Venuturumilli
(University of Waterloo)
Rubayet Al Maruf
(University of Waterloo)
Michael Li
(University of Waterloo)
Katie McDonnell
(University of Waterloo)
Michal Bajcsy
(University of Waterloo)
Cooling atoms radially (or in the transverse direction) can help confine them closer to the center [2] – thereby increasing the interaction between photons and atoms. Additionally, it can reduce the atom loss rate resulting from collisions with the wall of the fiber’s hollow core. Without sideways access to the atoms inside the fiber, Ref. [2] proposed and qualitatively demonstrated a technique to cool the fiber-confined rubidium atoms by utilizing the shifted dipole trapping potentials for the two hyperfine ground states (S1/2) and selectively pumping the atoms as they move radially. Here, we present quantitative results from the implementation of this protocol for transverse cooling of caesium atoms in our system.
[1]: Yoon, T. and Bajcsy, M., “Laser-cooled cesium atoms confined with a magic-wavelength dipole trap inside a hollow-core photonic-bandgap fiber,” Physical Review A 99(1), 023415 (2019)
[2]: Peyronel, T., Bajcsy, M., Hofferberth, S., Balic, V., Hafezi, M., Liang, Q., Zibrov, A., Vuletic, V., and Lukin, M. D., “Switching and counting with atomic vapors in photonic-crystal fibers,” IEEE Journal of Selected Topics in Quantum Electronics 18(6), 1747–1753 (2012)
*This research was undertaken in part thanks to funding from the Canada First Research Excellence Fund's Transformative Quantum Technologies (TQT) initiative.
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