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UID:1627@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20210709T140000
DTEND;TZID=Europe/Berlin:20210709T150000
DTSTAMP:20210708T181710Z
URL:https://qft.physik.hu-berlin.de/next-seminars/andrea-cristofoli-nbi-2/
SUMMARY:Andrea Cristofoli NBI - 
DESCRIPTION:Andrea Cristofoli (NBI)\n\nTitle: The on-shell highway to wavef
 orms\n\nAbstract:\n\nThe KMOC approach\, developed by David Kosower\, Ben 
 Maybee and Donal O'Connell\, is an on-shell formalism that expresses class
 ical observables in terms of quantum scattering amplitudes. After a first 
 review\, we will show how to generalize the original framework by includin
 g coherent states of massless bosons. This will allows us to describe clas
 sical wave phenomena naturally in terms of on-shell quantities. As an exam
 ple\, we will recompute the classic deflection of light and show how to re
 derive the impulse in the Thomson scattering. We will also see how to go b
 eyond global observables to compute local ones such as the electromagnetic
  and gravitational Newman–Penrose scalars. As an application\, we will s
 ee how to compute the radiated waveform in charged-particle scattering\, s
 howing at the end of the talk how it is linked directly to the expectation
  of the classical field.
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