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CATEGORIES:DAMTP Friday GR Seminar
SUMMARY:Well-posed formulation of scalar-tensor effective 
 field theory - Aron Kovacs (University of Cambridg
 e)
DTSTART;TZID=Europe/London:20200508T130000
DTEND;TZID=Europe/London:20200508T140000
UID:TALK141373AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/141373
DESCRIPTION:Effective field theory provides a way of parameter
 izing strong-field deviations from General Relativ
 ity that might be observable in the gravitational 
 waves emitted in a black hole merger. To perform n
 umerical simulations of mergers in such theories i
 t is necessary that the equations be written in a 
 form that admits a well-posed initial value formul
 ation. In this talk\, I will focus on gravity coup
 led to a scalar field including the leading (4-der
 ivative) effective field theory corrections (this 
 includes the so-called Einstein-dilaton-Gauss-Bonn
 et theory). I will explain how a new class of "mod
 ified harmonic" gauges and gauge-fixing procedures
  can be used to write the equations of motion of t
 his theory in a form that\, at weak coupling\, adm
 its a well-posed initial value problem. I will con
 clude by discussing possible applications to numer
 ical relativity.
LOCATION:Zoom
CONTACT:Dejan Gajic
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