Seminars and discussions on the post-Newtonian Expansion
The program is (Time zone is CET):
13.30 - 14.10: Luc Blanchet (Institut d'Astrophysique de Paris)
14.10 - 14.50: Michèle Levi (Niels Bohr Institute)
14.50 - 15.00: short break
15.00 - 15.40: Igor Pikovski (Stockholm University)
15.40 - 16.00: break
16.00 - 17.00 discussion (moderated by Dieter Van den Bleeken)
The titles of the talks and abstracts can be found below. Pdf files of the talks are linked to the tittles
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Speaker: Luc Blanchet
Title: The post-Newtonian description of inspiralling compact binaries
Abstract: Theoretical and numerical works on the two-body problem in general relativity (GR) play a very important role when detecting and interpreting the gravitational wave signals. In this talk, we review the present state-of-the-art on traditional post-Newtonian (PN) methods in GR, applied to the gravitational wave and phase evolution of inspiralling compact binaries. In particular, we emphasize some recent developments done in synergy with the effective field theory (EFT).
Speaker: Michèle Levi
Title: QFT for Gravity at All Scales
Abstract: We will present the state of the art in PN gravity, and its significant advancement via the EFT of spinning gravitating objects. First, we will introduce the concept of a tower of EFTs for the binary inspiral problem. We will then go over the intricate formulation of the EFT of spinning objects. Finally, we will present some advanced recent results accomplished
within this framework.
Speaker: Igor Pikovski
Title: Gravitational coupling to composite systems and their quantum interference
Abstract: The interplay between low-energy quantum physics and general relativity offers a variety of phenomena that shed light on some fundamental aspects of the two theories, and that may be probed in experiments. In recent years, “clock interferometry” has emerged as a new path to probe some aspects of this interplay. I will discuss how quantum coherence is affected in quantum interferometery with clocks in the presence of time dilation [1,2], and how the gravitational mass emerges for composite systems -- resolving an old conundrum in general relativity [3].
[1] M Zych, F Costa, I Pikovski, Č Brukner, Nature communications 2, 505 (2011)
[2] I Pikovski, M Zych, F Costa, Č Brukner, Nature Physics 11, 668–672 (2015)
[3] M Zych, Ł Rudnicki, I Pikovski, Physical Review D 99, 104029 (2019)
