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AdS3 gravity and random CFT
We compute the path integral of three-dimensional gravity with negative cosmological constant on spaces which are topologically a torus times an interval. These are Euclidean wormholes, which smoothly interpolate between...
Jun 16, 2020
Tensors, invariants, and optimization
Given a vector in a representation, can it be distinguished from zero by an invariant polynomial? This classical question in invariant theory relates to a diverse set of problems in...
Jun 17, 2020
Phase Shift of Gravitational Waves induced by Aberration
The velocity of a gravitational wave (GW) source provides crucial information about its formation and evolution processes. Previous studies considered the Doppler effect on the phase of GWs as a...
Jun 18, 2020
Phase Detection with Neural Networks: Interpreting the Black Box
Neural networks (NNs) normally do not allow any insight into the reasoning behind their predictions. We demonstrate how influence functions can unravel the black box of NN when trained to...
Jun 23, 2020
Neutrinos in Cosmology after Planck: What are their masses, properties, and relationship with the Hubble tension?
Neutrinos are a key (although implicit) ingredient of the standard cosmological model, LambdaCDM. Firstly, neutrinos directly participate in neutron freeze out during BBN, and secondly, they represent 40% of the...
Jun 23, 2020
The physics of compact objects in general relativity.
The study of compact objects in the strong field regime needs a thorough understanding of the initial value problem in general relativity at the resence of hydrodynamical or magnetohydrodynamical sources...
Jun 25, 2020
What’s Next for the Effective Field Theory of Large Scale Structure?
Over the last decade, the Effective Field Theory of Large Scale Structure (EFTofLSS) has emerged as a frontrunner in the effort to produce accurate models of cosmological statistics. Quantities such...
Jun 30, 2020
Space time fluctuations in AdS/CFT and Extensions to Minkowski
Zoom Link: https://pitp.zoom.us/j/93581608531?pwd=d3NRQXRGNTNISkhuWmxLYkJMZllTUT09 Based on recent work arXiv:1902.08207 and arXiv:1911.02018 with E. Verlinde.
Jul 07, 2020
Recent insights on SN1987a: implications for BSM phenomenology
New results from astrophysics have radically changed our understanding of neutron stars and supernovae, specifically SN1987A. In this talk, I will describe some of these results and the implications they...
Jul 07, 2020
Controlled access to the low-energy physics of critical Fermi surfaces
Condensed matter physics is the study of the complex behaviour of a large number of interacting particles such that their collective behaviour gives rise to emergent properties. We will discuss...
Jul 13, 2020