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SUMMARY:From Boundary Data to Bound States
DTSTART:20201123T140000
DTSTAMP:20260502T210546Z
UID:092a70951c260ce7f687d196c057184eb14874c4b9daaa41e9aac2fe
CATEGORIES:Conferences - Seminars
DESCRIPTION:Rafael Porto (DESY/Hamburg)\nThe talk is split in two chapters
 . After a brief introduction to the binary inspiral problem and the motiva
 tion to pursue high-accuracy computations\, in the first part I will demon
 strate how the seemingly unrelated scattering problem carries all the rele
 vant information to compute gravitational observables for elliptic orbits 
 via a “boundary to bound” (B2B) dictionary — without ever resorting 
 to a Hamiltonian. In the second part\, I will show how an effective field 
 theory (EFT) approach to the two-body problem in general relativity\, toge
 ther with modern integration methods from particle physics\, allow us to s
 ystematically (and very efficiently) obtain the scattering data to input i
 n the B2B map. As a paradigmatic example\, I readily derive all the adiaba
 tic invariants for bound states of non-spinning compact objects to third o
 rder in Newton’s constant and to all orders in the relative velocity —
  known as the third "Post-Minkowskian" order — from a computation of the
  scattering angle in the EFT approach.  
LOCATION:Zoom webinar https://epfl.zoom.us/j/81370549597
STATUS:CONFIRMED
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