BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//7.3.6//EN
TZID:Europe/Berlin
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VEVENT
UID:2527@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20260610T133000
DTEND;TZID=Europe/Berlin:20260610T143000
DTSTAMP:20260602T084255Z
URL:https://qft.physik.hu-berlin.de/next-seminars/qft-colloquium-ira-roths
 tein-carnegie-mellon/
SUMMARY:QFT Colloquium: Ira Rothstein (Carnegie Mellon) - 
DESCRIPTION:Announcing the QFT Colloquium on Wednesday\, 10 June\, at 13:30
 \, at room 1.221 (CSMB building)\, Zum Großen Windkanal 2\, 12489 Berlin.
 \n\nProf. Ira Rothstein (Carnegie Mellon University)\n\nTitel: A unified 
 approach to the self force problem\n\nAbstract: The self force problem is 
 ubiquitous in astrophysics and cosmology. It is defined by the following s
 ituation. An object moves in contact with an external system (S)\, which m
 ay or may not break Poincare invariance.  The motion of the object deform
 s S which then back-reacts on the particle and changes its dynamics. When 
 S is Poincare invariant (no medium)  this back reaction is called "Radiat
 ion Reaction Forces" while when it S violates this symmetry it is called 
  (incompletely) "Dynamical Friction".   In addition\, a symmetry breaki
 ng medium leads to accretion of mass which can be a leading order effect.\
 n\nIn this talk I will introduce an effective field theory which generaliz
 es the case of the vacuum to a medium. This theory turns out to have an in
 teresting renormalization group flow in the context of the Schwinger Keldy
 sh formalism and allows one to calculate in a systematic way  all of the 
 above-mentioned effects for any choice of S.
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
BEGIN:DAYLIGHT
DTSTART:20260329T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
END:DAYLIGHT
END:VTIMEZONE
END:VCALENDAR