The reionization of the intergalactic medium (IGM) is one of the last mostly unexplored frontiers is observational astrophysics. In this talk I will discuss some recent developmentin the theoretical modeling of the process which will aid the interpretation of upcoming observations. I will also present prospects in the detection of ...
The matter present in our universe is dominated by a component which has the properties of a non-relativistic collisionless fluid, dubbed dark matter (DM). This claim assumes that General Relativity (GR) holds on cosmological scales, currently a reasonable hypothesis, while extensions of GR are also investigated. Standard particle and nuclear ...
In our everyday experience, the mass of an object is the sum of the
mass of its parts. However, in the world of subatomic particles, this everyday
assumption is no longer true and even very small mass differences can have
cosmic consequences. After an introduction to the mechanisms by which ...
Soft elastic interfaces exhibit intriguing similarities to liquid interfaces:
they possess a surface tension and are susceptible to interfacial
instabilities. The first part of this talk addresses how soft solids behave
when exposed to liquid drops, which provide a singular forcing. It is shown
that such "soft wetting" fundamentally differs ...
The coupling of baryons and photons by Thomson scattering in the
early universe leads to a rich structure in the power spectra of the cosmic
microwave background photons and the matter. The study of these "echoes of
gravity" has revolutionized cosmology and allowed precise measurement of a
host of important ...
This talk will show that bacterial suspensions, beyond their
intrinsic, dominating importance in biology, are also excellent systems to
explore and test theoretical results on active matter, I will present recent
experimental results on dense bacterial suspensions obtained in the groups of
Masaki Sano (University of Tokyo), Yilin Wu (Chinese ...
Long-range enhancers - found as far away as 1 megabase from their
target gene - are key in controlling precise spatial and temporal gene
expression in mammals. In contrast to the 20,000 or so genes in our genome,
there may be hundreds of thousands, or even millions, of enhancers. Deletion,
Jets at particle colliders are our window into fundamental reactions that
sometimes proceed through confined degrees of freedom that are invisible at
long distances. I'll review some of the history and theory of particle jets,
and how they reflect a crossroads between classical and quantum phenomena.
Massive black holes, weighing millions to billions of solar
masses, inhabit the centers of today's galaxies. Black hole masses typically
scale with properties of their host galaxies, such as mass and velocity
dispersion. The progenitors of these black holes powered luminous quasars
within the first billion years of the ...
I will review new developments in lattice simulations in kaon
physics designed to explore the limits of the Standard Model and to search for
signatures of new physics. For the decays of kaons (and pions) into leptons,
the precision of lattice computations is now such that electromagnetic and
strong isospin-breaking ...
Active materials such as bacteria, molecular motors and self-
propelled colloids, are Nature's engines. They continuously transform chemical
energy from their environment to mechanical work. Dense active matter shows
mesoscale turbulence, the emergence of chaotic flow structures characterised
by high vorticity and motile topological defects. I shall describe flow ...
I will discuss the weak scale hierarchy problem from a known, but
less mainstream, direction and I will argue that the hints we have observed
for high energy physics may in fact be a smokescreen, with the new physics
responsible for these hints lying much closer to accessible energies. In ...
The talk will discuss how the observed structure in the evolved (last 1 Gyr) Universe offers a unique probe of fundamental physical theories operating on cosmological scales. The focus will be on implications of deviations of motions of galaxies from a pure Hubble flow of the cosmic background. While the ...