<div dir="ltr"><div><span class="gmail-il" style="">This is a reminder for today's seminar:</span></div><div><b><span class="gmail-il"><br></span></b></div><div><b><span class="gmail-il">Rafael</span> <span class="gmail-il">Porto</span> (DESY): "<span style="font-size:10pt;font-family:Arial;text-align:center">From Boundary Data to Bound States</span>"</b></div><div><b>Dec, 9th (Wed) @ 2pm </b>(due to some time constraint of the speaker we will start sharp - the talk will be also recorded)</div><br><i>The talk is split in two chapters. After a brief introduction to the binary inspiral problem and the motivation to pursue high-accuracy computations, in the first part I will demonstrate how the seemingly unrelated scattering problem carries all the relevant 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, together with modern integration methods from particle physics, allow us to systematically (and very efficiently) obtain the scattering data to input in the B2B map. As a paradigmatic example, I readily derive all the adiabatic invariants for bound states of non-spinning compact objects to third order 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.</i><div><i><br></i></div><div><i><br></i><div>Zoom link: <a href="https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09" target="_blank">https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09</a> <br></div><div><div><div>ID meeting: 812 8370 7469<br>Passcode: 915450</div></div></div></div><div><br></div><div>Cheers,</div><div>Paolo</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>From: <strong class="gmail_sendername" dir="auto">Paolo Pani</strong> <span dir="auto"><<a href="mailto:paolo.pani@uniroma1.it">paolo.pani@uniroma1.it</a>></span><br>Date: Thu, Dec 3, 2020 at 10:26 PM<br>Subject: Gravity theory webinar Wed Dec 9th @2pm: Rafael Porto (DESY) - "From Boundary Data to Bound States"<br>To: <<a href="mailto:seminari-infn@roma1.infn.it">seminari-infn@roma1.infn.it</a>>, <<a href="mailto:astroseminar@roma1.infn.it">astroseminar@roma1.infn.it</a>>, <<a href="mailto:teograv-seminars@googlegroups.com">teograv-seminars@googlegroups.com</a>><br></div><br><br><div dir="ltr"><div>Next gravity-theory webinar is</div><div><br></div><div><b>Rafael Porto (DESY): "<span style="font-size:10pt;font-family:Arial;text-align:center">From Boundary Data to Bound States</span>"</b></div><div><b>Dec, 9th (Wed) @ 2pm</b></div><br><i>The talk is split in two chapters. After a brief introduction to the binary inspiral problem and the motivation to pursue high-accuracy computations, in the first part I will demonstrate how the seemingly unrelated scattering problem carries all the relevant 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, together with modern integration methods from particle physics, allow us to systematically (and very efficiently) obtain the scattering data to input in the B2B map. As a paradigmatic example, I readily derive all the adiabatic invariants for bound states of non-spinning compact objects to third order 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.</i><div><i><br></i></div><div><i><br></i><div>Zoom link: <a href="https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09" target="_blank">https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09</a> <br></div><div><div><div>ID meeting: 812 8370 7469<br>Passcode: 915450</div><div><br></div><div>Calendar of the future gravity theory webinars: <a href="https://calendar.google.com/calendar/u/1?cid=Y191MGo3bG9pYzE1bjBxdGFhN3A4MTlzNDg2Y0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t" target="_blank">https://calendar.google.com/calendar/u/1?cid=Y191MGo3bG9pYzE1bjBxdGFhN3A4MTlzNDg2Y0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t</a></div></div><div><br></div><div>Cheers,</div><div>Paolo</div></div><br>-- <br>Paolo Pani <br>Associate Professor<br>ERC StG Fellow, DarkGRA project<br>Junior Fellow, Scuola Superiore di Studi Avanzati Sapienza<br><br>Physics Department (Marconi Building), 3rd floor, room 334<br>Sapienza University of Rome<br>Piazzale Aldo Moro 5 - 00185 Rome (Italy) <br>+39 06 4991 4472 (int 24472)</div></div>
</div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Paolo Pani <br>Associate Professor<br>ERC StG Fellow, DarkGRA project<br>Junior Fellow, Scuola Superiore di Studi Avanzati Sapienza<br><br>Physics Department (Marconi Building), 3rd floor, room 334<br>Sapienza University of Rome<br>Piazzale Aldo Moro 5 - 00185 Rome (Italy) <br>+39 06 4991 4472 (int 24472)</div></div></div>
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