PIRSA:25030168

Video URL

https://pirsa.org/25030168

QED in a Box

(2025). QED in a Box. Perimeter Institute for Theoretical Physics. https://pirsa.org/25030168

QED in a Box. Perimeter Institute for Theoretical Physics, Mar. 11, 2025, https://pirsa.org/25030168 

          @misc{ scivideos_PIRSA:25030168,
            doi = {10.48660/25030168},
            url = {https://pirsa.org/25030168},
            author = {},
            keywords = {Particle Physics},
            language = {en},
            title = {QED in a Box},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2025},
            month = {mar},
            note = {PIRSA:25030168 see, \url{https://scivideos.org/index.php/pirsa/25030168}}
          }
Yonatan Kahn
Talk numberPIRSA:25030168
DOI10.48660/25030168
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The measurement of the electron magnetic moment (g-2)_e has reached the spectacular precision of sub-parts-per-trillion, and is currently the highest-precision measurement of a property of a fundamental particle. The next iteration of the measurement is expected to improve the precision by almost an order of magnitude, at which point the leading systematic uncertainty will be the “cavity shift”: the modification of the electron energy levels due to the conducting walls of the cavity in which the electron is trapped. This quantity cannot be directly measured at the required precision, and must be calculated. I will review the setup of the (g-2)_e experiment and present a new calculation of the cavity shift using the full machinery of quantum mechanics and quantum electrodynamics, which improves upon previous classical calculations with a consistent renormalization scheme while allowing for individual quality factors for each cavity mode.