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Events Archive 2021
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Quantum aspects of twofield cosmology—Thomas COLAS
In singlefield inflation, cosmological perturbations are placed in a twomode squeezed state from which cosmological structures later form. The generalization to twofield cosmology naturally leads to the concept of fourmode squeezed states. In this talk, I will introduce these states, show how they can be understood as two twomode squeezed ...
4312
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Seminar by Ben Page
TBA
Higgs Centre Seminar Room, JCMB
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Strong field QED: probing fundamental physics with intense lasers—Anton ILDERTON
I will give an overview of efforts to probe nonperturbative 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 RitusNarozhny conjecture ...
Higgs Centre Seminar Room, JCMB
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Seminar by Gang Chen
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 ...
Higgs Centre Seminar Room, JCMB
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Interference, Caustics and Oscillatory Integrals—Job FELDBRUGGE
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 ...
Higgs Centre Seminar Room, JCMB
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YangMills observables: from KMOC to eikonal through EFT—Leonardo DE LA CRUZ
In this talk we present the integrated result of NLO conservative YangMIlls observables in the KMOC formalism. On the other hand, extending a recentlyintroduced framework based on scattering amplitudes and effective field theory (EFT) to consider colourcharged objects, we obtain a conservative Hamiltonian describing the interactions of two charged bodies ...
Higgs Centre Seminar Room, JCMB
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Cosmology with radio and optical surveys—Alkistis POURTSIDOU
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 ...
The Higgs Centre for Theoretical Physics
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Seminar by Stephen Jones
To be announced
Higgs Centre Seminar Room, JCMB
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Big vs Small: What Is the Mass of the First Stars?—Volker BROMMAnna FREBELStefania SALVADORI
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 ...
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Detection of New Physics From the Muon g2 Experiment: Much Ado About Nothing?—Christoph LEHNERLaurent LELLOUCH
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 ...
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Machine Learning, the Djinni in the Bottle: Predicting without Understanding?—George BIROSVeronica SANZ
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 ...
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