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Colloquia Archive 2023
This event is a Colloquium.

Our Universe in a Supercomputer—Debora SIJACKI
Cosmological simulations of galaxy and structure formation have undergone rapid development over the last decade and this progress is currently accelerating. The methodology evolved from purely gravitational computations of large scale structure to full hydrodynamical simulations which include a plethora of complex baryonic physical processes. Recent successes of these simulations ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Unitarity and quantum resolution of gravitational singularities—Steffen GIELEN
In trying to formulate quantum theories of gravity, we need to agree on which principles of quantum mechanics and general relativity are expected as fundamental in the new theory. One of the most important properties of standard quantum mechanics is unitarity of time evolution.
Quantum gravity is often expected or ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Complexity in Quantum Field Theories—Pawel CAPUTA (cancelled)
I will review recent progress on quantifying complexity of quantum states and operators. After introducing some of the interesting complexity measures, I will discuss what can be learnt from these new tools in quantum manybody systems and quantum field theories.
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

The Quest for Fusion Energy—Fulvio MILITELLO
Discussing the benefits and challenges around the development of fusion energy.
The Colloquium is followed by MSc Project Presentations via the HiggsUKAEA Plasma Physics Workshop Zoom.
14:20 MSc Project Talk  Samuli Saarelma (UKAEA) (0h25′)
14:45 MSc Project Talk  Colin Roach (UKAEA) (0h25′)
15:10 MSc Project Talk  Michael ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Emergent Phenomena at High Energies  Their Beauty and Challenges—Peter SKANDS
I will give an overview of our current picture of two ubiquitous and compelling phenomena in highenergy physics  jets and strings. By their nature, these are not immediately evident from the Lagrangian densities or Feynman Rules of the Standard Model of Particle Physics. I will review the current state of ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Witnesses of nonclassicality beyond quantum theory—Chiara MARLETTO
The theory of quantum computation has brought us rapid technological developments, together with remarkable improvements in how we understand quantum theory. In this talk, I shall describe the foundations of a theoretical programme to extend the quantum theory of computation beyond quantum theory itself, based on the recently proposed constructor ...
Online
This event is a Colloquium.

MultiScale Simulations of Thermodynamics and Transport in Polymeric, Colloidal, and Surfactant Selfassembling Materials—Ronald LARSON
Continuumlevel thermodynamic and transport properties relevant to long time and length scales can now be computed from molecularscale interactions using multiscale molecular dynamics (MD) simulations and Brownian dynamics (BD) simulations, along with biasing methods, such as umbrella sampling, and forward flux sampling. We demonstrate the power of these methods by ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Emergent Space and Entanglement—Sumit DAS
The holographic correspondence relates a nongravitational theory to a gravitational theory in a higher number of spacetime dimensions. In many instances of holography, the additional space dimensions are emergent: internal degrees of freedom in large matrix valued fields metamorphose into space, and their dynamics becomes reinterpreted as gravitational dynamics. This ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Modeling largescale structure: symbiosis of simulations and theory—Martin WHITE
The Universe we observe exhibits order on a wide range of scales, and the study of this largescale structure provides one of our premier laboratories for fundamental physics, cosmology and astrophysics. I will describe a program to combine analytic models and numerical simulations of this large scale structure applicable to ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Chaos and the reversibility of time in Newton’s theory of Gravity—Simon PORTEGIES ZWART
The fundamental laws of physics are timesymmetric, but our
macroscopic experience contradicts this. The time reversibility
paradox is partly a consequence of the unpredictability of Newton’s
equations of motion. We measure the dependence of the fraction of
irreversible, gravitational Nbody systems on numerical precision and
find that it scales ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Beyond Energetic and Scalar measures with Vector Fields: Next Generation QTAIM—Samantha JENKINS
Next Generation Quantum Theory of Atoms in Molecules (NGQTAIM) is constructed from the eigenvectors of the Hessian of the total (realspace) charge density distribution ρ(r) field and can also use the eigenvectors of the stress tensor σ(r) and the Ehrenfest Force F(r) = ∙σ(r). NGQTAIM can, for ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Cosmological collider physics and primordial standard clocks—Xingang CHEN
In this talk we will introduce two research programs that aim to understand the physics of the primordial universe, leading up to the Big Bang universe. We will do so by studying the properties of primordial density perturbations that seeded the structure of the universe. In the cosmological collider physics ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Complete and partial wetting in active liquids—Francesco TURCI
Dry and wet layers on a wall are the surface manifestation of equilibrium liquidvapour phase transitions. Active liquids are disordered nonequilibrium systems that dissipate energy locally, able to produce phase separation in the absence of attractive interactions. We connect the emergent motilityinduced separation of model active liquids with effective manybody ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Dynamics of Dark Matter—Martin WEINBERG
'Dark matter' (DM) is a dynamical hypothesis born from our inability
to comprehend kinematic observations at the galaxy scale and larger
using baryonic matter only. Astronomers have struggled with the
implications of DM for galaxy formation and evolution for decades.
Conversely, we've exploited observations and cosmological simulations
to constrain ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Nonperturbative Amplituhedron Geometry—Jaroslav TRNKA
I will review recent progress on the connections between scattering amplitudes in quantum field theory and the geometry of Amplituhedron, a recently discovered mathematical object which captures particle dynamics of strong interactions. In this picture, the physics problem of predicting the outcomes of particle scattering is reformulated as the mathematical ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

The Black Hole Information Paradox: A Resolution on the Horizon?—Netta ENGELHARDT
The black hole information paradox — whether information escapes an evaporating black hole or not — remains one of the most longstanding mysteries of theoretical physics. The apparent conflict between validity of semiclassical gravity at low energies and unitarity of quantum mechanics has long been expected to find its resolution in a ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Interaction between fast tides and convection with application to giant planets and solar type stars—Caroline TERQUEM
Stars are often found in close binary systems, and gaseous giant planets in the solar system are surrounded by moons. Tides are raised in the bodies in these systems, and their dissipation plays a major role in shaping the orbits. The dissipation rate is very well constrained by observations. For ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Using numerical simulations to probe fundamental physics in strong gravity regimes—Katy CLOUGH
Numerical relativity simulations have allowed us to isolate and characterise the gravitational wave signals from merging black holes and neutron stars, giving us information about their parameters and astrophysical origins. The same simulations provide an opportunity to probe new effects beyond the standard model + GR paradigm, including new particles and ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Challenging physics at the boundary between the Earth's atmosphere and Space—Jorge CHAU
The extended mesosphere and lower thermosphere (MLTX) region, i.e., between 60 and 200 km altitude, is the region where the Earth's atmosphere meets Space. This region is too low/high for in situ measurements with satellites/balloons. In the last few decades, MLTX altitudes have been explored with ...
Higgs Centre Seminar Room, JCMB
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