Bulletin of the American Physical Society
2024 APS April Meeting
Wednesday–Saturday, April 3–6, 2024; Sacramento & Virtual
Session N00: Poster Session II (2:00PM - 4:00PM PT) & Coffee Break VI (2:00PM - 2:30PM PT)
2:00 PM,
Friday, April 5, 2024
SAFE Credit Union Convention Center
Room: Exhibit Hall A, Floor 1
Abstract: N00.00044 : Testing the Neutrality of Matter Using Optically Levitated Microspheres
Presenter:
Zhengruilong Wang
(Stanford Unviersity)
Authors:
Lorenzo Magrini
(Univ of Vienna)
Zhengruilong Wang
(Stanford Unviersity)
However, the potential unbalances between them could shed light on new physics. We report an
experiment system which traps and cools dielectric microspheres, which are levitated by high
intensity laser and isolated from the environment noise. Such a system offers us a highly sensitive
stage for measuring exceedingly weak forces. Combined with active feedback techniques, we
achieve a resonance peak around 500Hz for a microsphere with a diameter of 7.5?? trapped in a
focused laser beam at several mbar gas pressure in the vacuum chamber. These results provide us
with a solid foundation of future precision measurement and an exceeding charge sensitivity is
expected.
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