Events Archive 2021

In single-field inflation, cosmological perturbations are placed in a two-mode squeezed state from which cosmological structures later form. The generalization to two-field cosmology naturally leads to the concept of four-mode squeezed states. In this talk, I will introduce these states, show how they can be understood as two two-mode squeezed ...

TBA

I will give an overview of efforts to probe non-perturbative structures in QED using intense laser fields, beginning with an introduction to the Furry expansion of observables in strong backgrounds, which is the basis of most modern theory calculations in "strong field QED". I will then introduce the Ritus-Narozhny conjecture ...

HEFT kinematic algebra, heavy double copy and classical gravitational scattering In this talk, I will introduce the kinematic algebra and a new double copy in heavy effective field theory (HEFT). I will also present the application of the novel double copy to classical gravitational scattering. Recently we proposed a new ...

Interference is one of the most universal phenomena in nature. In classical physics, the linear superposition of sound waves, surface waves, radio waves, light or gravitational waves all exhibit the same characteristic patterns of constructive and destructive interference. Interference is also fundamental to quantum physics, as exemplified by the Feynman ...

In this talk we present the integrated result of NLO conservative Yang-MIlls observables in the KMOC formalism. On the other hand, extending a recently-introduced framework based on scattering amplitudes and effective field theory (EFT) to consider colour-charged objects, we obtain a conservative Hamiltonian describing the interactions of two charged bodies ...

I will describe how radio telescope arrays like MeerKAT and the Square Kilometre Array can kick off an exciting new era in cosmology using the innovative neutral hydrogen intensity mapping technique. I will also talk about the forthcoming Euclid satellite mission, concentrating on the theoretical modelling challenges we need to ...

Light from stars is one of the main tools that aids in the exploration of the Universe through cosmic time. To do so a good understanding of the properties of stars in particular their masses and luminosities is required. Detailed measurements of individual stars close to us suggest that the ...

Answering questions such as "What is dark matter?" or "What happened directly after the Big Bang?" requires finding new physics, like not yet known particles or forces. Via quantum effects such new physics will contribute tiny amounts to properties of known particles and could be discovered by observing small deviations ...

Artificial Intelligence (AI) and Machine Learning (ML) were developed by humans in an attempt to aid in their innate limitations to see deep into complex data. In recent years we have seen a momentous expansion of the field, fuelled by exponential growth in computing power. While it was easy to ...