BEGIN:VCALENDAR
VERSION:2.0
PRODID:www.imperial.ac.uk
BEGIN:VEVENT
UID:610c507e7bbf1
DTSTART:20210514T120000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20210521T130000Z
URL:https://www.imperial.ac.uk/events/134895/pure-analysis-and-pdes-seminar
-aron-kovacs-cambridge-the-cauchy-problem-and-the-initial-data-problem-in-
effective-theories-of-gravity/
LOCATION:United Kingdom
SUMMARY:Pure Analysis and PDEs seminar: Aron Kovacs (Cambridge)\, “The C
auchy problem and the initial data problem in effective theories of gravit
y”
CLASS:PUBLIC
DESCRIPTION:Abstract:\nLovelock and Horndeski theories are diffeomorphism-i
nvariant theories of\ngravity with second-order equations of motion. A sub
set of these\ntheories can be motivated by effective field theory consider
ations\, and\nhence they could describe strong-field deviations from gener
al\nrelativity. In particular\, the effects of some Horndeski theories mig
ht\nbe observable by present and future gravitational wave detectors.\nIn
this talk\, I will discuss recent work with Harvey Reall\, showing that\nt
hese theories admit a locally well-posed initial value formulation at\n“
weak couplings”. This is achieved by introducing a novel class of\n“mo
dified harmonic” gauge conditions and gauge-fixing procedures. If\ntime
allows\, I will also discuss methods to construct asymptotically\nflat ini
tial data in weakly coupled Lovelock and Horndeski theories\nwhich may be
relevant to binary black hole systems.
X-ALT-DESC;FMTTYPE=text/html:Abstract:

\nLovelo
ck and Horndeski theories are diffeomorphism-invariant theories of<
br />\ngravity with second-order equations of motion. A subset of th
ese

\ntheories can be motivated by effective field theor
y considerations\, and

\nhence they could describe stron
g-field deviations from general

\nrelativity. In particu
lar\, the effects of some Horndeski theories might

\nbe
observable by present and future gravitational wave detectors.

\
nIn this talk\, I will discuss recent work with Harvey Reall\, sh
owing that

\nthese theories admit a locally well-posed i
nitial value formulation at

\n“weak couplings”. This
is achieved by introducing a novel class of

\n“modifi
ed harmonic” gauge conditions and gauge-fixing procedures. If

\ntime allows\, I will also discuss methods to construct asymptoti
cally

\nflat initial data in weakly coupled Lovelock and
Horndeski theories

\nwhich may be relevant to binary bl
ack hole systems.

DTSTAMP:20210805T205630Z
END:VEVENT
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