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Explore a cutting-edge quantum physics experiment in this 20-minute conference talk that examines one of fundamental physics' most important empirical questions: the apparent equality of electron and proton charges. Learn about the development of a revolutionary quantum test using the scalar Aharonov-Bohm effect in an atom interferometer, which has the potential to improve current sensitivity measurements by several orders of magnitude beyond the existing 10^-21 fractional charge difference limit achieved through classical physics techniques. Discover the current state of construction for the atom interferometer drop tower and the specialized in-vacuum electrodes designed to apply potential differences across atomic wavefunctions. Gain insights into recent research progress on understanding image charge effects from nearby conductors that can potentially screen experimental signals, and examine proposed mitigation strategies through optimized electrode charging schemes. This presentation is part of the Simons Foundation's program supporting high-risk, high-return small-scale experimental projects aimed at pushing beyond the current frontiers of fundamental physics through table-top experiments suitable for university research laboratories.
