專題演講 Seminar

2017/11/24(Fri)     11:00 -12:30    七樓研討室 7F, P7F Seminar Room

Title

Effective Field Theory and Quantum Dynamics in Strong Classical Fields

Speaker

Dr. Lance Labun (University of Texas at Austin)

Abstract

High-intensity lasers are close to becoming a new resource high-energy particle and radiation studies. The Texas Petawatt laser produces 100 MeV-2 GeV electrons and recently demonstrated high-flux highly-collimated 10-70 MeV photons. The challenge is reliably predicting the energy and distribution of emitted photons, because both classical and quantum particle dynamics are important and involve many length scales. I will introduce the experiments, qualitative phenomenology, and some order-of-magnitude expectations from numerical plasma simulation. I will then discuss factorization of the photon angular distribution within the full theory of quantum electrodynamics and show that corrections to photon emission can be of order 50% despite the smallness of the QED coupling.

Language

演講語言 (Language): in English