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Positive Moments for Scattering Amplitudes
I will discuss the conditions satisfied by the 2 → 2 scattering amplitude in unitarity and causal theories, presenting a simple formulation in term of moments of a positive measure...
Feb 09, 2021
Prospects in Celestial Holography
Have you always wanted to know: What the symmetries of nature are? How black holes process quantum information? What the ultimate UV description of our universe is? Then join me...
Feb 10, 2021
The theory of quantum information: channels, capacities, and all that
Information theory offers mathematically precise theory of communication and data storage that guided and fueled the information age. Initially, quantum effects were thought to be an annoying source of noise...
Feb 10, 2021
Spontaneous black hole scalarization
General Relativity remains to this day our best description of gravitational phenomena. Nonetheless, issues such its quantization and cosmological constant problem suggest Einstein’s theory might not be final theory of...
Feb 11, 2021
Quantizing Time
Whatever the final theory of quantum gravity turns out to be, it will need to reconcile the incongruent ways in which time appears in quantum mechanics and general relativity. Quantum...
Jun 14, 2021
Melonic field theories
The melonic limit of a field theory is a large-N limit in which melonic diagrams dominate, thus differing significantly from the cactus and planar limits of vector and matrix models...
Feb 11, 2021
Constraining Early Dark Energy with Large Scale Structure
The Hubble tension is conventionally viewed as that between the cosmic microwave background (CMB) and the SH0ES measurement. A prominent proposal for a resolution of this discrepancy is to introduce...
Feb 16, 2021
Axion Cosmic Strings: Players in the Early Universe?
Axion cosmic strings have for some time been considered a potential source of enhancement of axion dark matter production, and have been the subject of extensive simulations (for references, see...
Feb 16, 2021
Three Perimeter faculty receive NSERC Discovery Grants
The Natural Sciences and Engineering Research Council of Canada (NSERC) recently announced the recipients of its 2014 Discovery Grants, a list that included three members of Perimeter’s faculty. Jaume Gomis...
Tensor Networks: from Simulations to Holography III
This workshop aims to stimulate the exchange between different research areas where tensor network techniques are applied, in particular lattice gauge theories, holography and condensed matter physics. Registration for this...
Nov 16, 2020