# Seminars & Colloquia Calendar

## The classical radiation reaction problem

#### Michael Kiessling, Rutgers University

Location: ** Hill 705**

Date & time: Thursday, 31 October 2019 at 5:00PM - 6:00PM

*Abstract:* Physics folklore says that a classical point charge, when accelerated by some electromagnetic field, produces electromagnetic radiation through which it loses energy and momentum to the field degrees of freedom. Many physicists (in particular: Abraham, Lorentz, Dirac, Landau and Lifshitz, ...) tried to compute the associated `radiation-reaction' force on the point charge. Alas, all proposals so far failed the litmus test: their fomulas produce a vanishing radiation-reaction when a point charge is accelerated by a uniform electric field (such as occurs between the plates of a charged capacitor). Recently I combined ideas of Poincare' and of Bopp, Lande'-Thomas, and Podolsky, and managed to compute the exact expression for the radiation-reaction force in a classical electrodynamics model.

Jointly with Shadi Tahvildar-Zadeh we also proved local well-posedness of the joint initial-value problem for fields and point charges. Since the self-force expression is very complicated, MAPLE was then used to study the motion of a point charge accelerated by a constant electric field. Radiation-reaction effects showed very clearly and dramatically: unexpectedly, a dynamical phase transition was found. Subsequently a proof of this dynamical scenario was supplied. I will explain all this without getting into the nitty-gritty of the technical details.

Charles Weibel Organizer's Page

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P. Gupta, X.Huang and J. Song Organizer's webpage

Swastik Kopparty, Sepehr Assadi Seminar webpage

Jeffry Kahn, Bhargav Narayanan, Jinyoung Park Organizer's webpage

Yonah Biers-Ariel, Mingjia Yang, and Doron Zeilberger --> homepage

Paul Feehan, Manousos Maridakis, Natasa Sesum Organizer's webpage

Lev Borisov, Emanuel Diaconescu, Angela Gibney, Nicolas Tarasca, and Chris Woodward Organizer's webpage

Jason Saied Seminar webpage

Brian Pinsky, Rashmika Goswami website

Corrine Yap Organizer's webpage

James Holland; Organizer website

Edna Jones Organizer's webpage

Brooke Ogrodnik website

Yanyan Li, Zheng-Chao Han, Jian Song, Natasa Sesum

Organizer: Luochen Zhao

Yanyan Li, Zheng-Chao Han, Natasa Sesum, Jian Song

Lisa Carbone, Yi-Zhi Huang, James Lepowsky, Siddhartha Sahi Organizer's webpage

Simon Thomas website

Kasper Larsen, Daniel Ocone and Kim Weston Organizer's page

Joel Lebowitz, Michael Kiessling

Yanyan Li, Haim Brezis

Stephen D. Miller, John C. Miller, Alex V. Kontorovich, Alex Walker seminar website

Stephen D. Miller

Organizers: Yanyan Li, Z.C. Han, Jian Song, Natasa Sesum

Yael Davidov Seminar webpage

Kristen Hendricks, Xiaochun Rong, Hongbin Sun, Chenxi Wu Organizer's page

Ebru Toprak, Organizer

Fioralba Cakoni Seminar webpage

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