Colloquia Archive 2019

Nov012019

A Quantum Universe Before the Big Bang(s)?—Gabriele VENEZIANO

Abstract:

Modern inflationary cosmology avoids the shortcomings of the old hot big bang model by making crucial use of quantum phenomena occurring during inflation as well as at its end ...

Oct222019

The first image of a black holeLuciano REZZOLLA

I will discuss how the first image of a black hole was recently obtained by the Event Horizon Telescope collaboration. In particular, I will describe how modelling the dynamics of ...

Jun262019

Fun with Path IntegralsNeil TUROK

Abstract:

Feynman's path integral provides an elegant formulation of quantum physics, particularly suited to theories with continous symmetries, like gauge theories and general relativity. However, it has proven difficult ...

Apr192019

Clustering and Correlations in Fluctuating Environments—Mustansir BARMA

Abstract:

Shared histories lead to strong correlations. Thus, particles which find themselves in the same evolving environment have a tendency to cluster and approach an interesting state. This talk is ...

Apr052019

The Surprising Simplicity of Scattering Amplitudes—Jacob Lewis BOURJAILY

Abstract:

Quantum field theory is the modern manifestation of "force equals mass times acceleration": it is the underlying, mathematical framework in which understand and describe physical laws today—from the ...

Mar292019

Variational Quantum Algorithms—Jose Ignacio LATORRE

Small quantum computers are now a reality. They provide the instrument to test new ways to process information using quantum logic. We analyze novel ideas to build hybrid quantum algorithms ...

Mar222019

The Limits of CosmologyJoseph SILK

One of our greatest challenges in cosmology is understanding the origin of the structure of the universe, and in particular the formation of the galaxies. I will describe how the ...

Mar152019

Testing General Relativity with Cosmological observations—Ruth DURRER

Abstract:

General Relativity (GR) is immensely successful. With the late discovery of gravitational waves from black hole and neutron star mergers, it has passed all the tests with flying colors ...

Feb082019

Causal Sets, Discrete GravityFay DOWKER

Quantum gravity is the name of a problem, not a theory. The problem is that we do not have a unified framework for fundamental physics in which both gravity and ...