In the search for dark matter (DM), one particular focus is on light and ultra-light dark matter, i.e. sub-GeV mass dark matter from a hidden dark sector with a new force interacting with the standard model or ultra-light DM with mass range from 10−22 eV to keV. The arguably most popular example of the latter class is the axion, invoked to solve the apparent absence of CP violation in Quantum Chromo Dynamics. Detection of these particles poses new challenges to potential sensor materials: very small energy depositions, magnetic properties and anisotropic response to particle interactions for example become crucial requirements. The challenge of finding suitable materials fits well with recent developments in solid state physics: Motivated by the exponential growth of computational power and the resulting data, we witness the rapid adoption of functional materials prediction within the framework of materials informatics. Here, methods adapted from computer science based on data-mining and machine learning are applied to identify materials with requested target properties.

The purpose of this winter school is to provide PHD students and young postdocs in the Nordic countries with introductory and advanced courses in a range of the most important topics in the field of theoretical cosmology. Furthermore, the school will provide a way to bring together students and young postdocs across different fields, research institutions and countries.

Understanding stellar convection is of crucial importance to many fields of stellar astrophysics. For example, the generation and maintenance of differential rotation and large-scale magnetic fields in stars rely on turbulent convection. However, mounting evidence suggests that our understanding of stellar convection is much more incomplete than previously thought. We bring together experts in three-dimensional convection simulations, helio- and asteroseismology, and theoreticians working on replacing the mixing length concept to present the latest developments and to address open problems in the field.

In the Standard Model, the mass of the Higgs boson is greatly destabilised by quantum corrections, and free parameters of the model need to be extremely fine-tuned in order to arrive at the measured Higgs mass. A fundamental aim of this program is to quantify the extent to which current measurements and searches can constrain models which attempt to restore naturalness by extending the SM. The expected sensitivity from future high precision running at the LHC and of planned non-collider experiments will also be studied. This program deviates from related work in this field by maintaining a sharp focus on the naturalness question and how well a top quark partner can resolve it in different theoretical scenarios using a range of measured observables.

The question of how particles and droplets can grow in a turbulent environment is of great current interest in many fields, in astrophysics, cloud microphysics, in biology, and in the engineering sciences. For example, coagulation and condensation in turbulent clouds turn microscopic cloud droplets into rain drops. In astrophysics, planetesimals are thought to form by aggregation of microscopic dust grains in the turbulent environment surrounding a forming star. In both cases, turbulence is believed to be a crucial factor for particle growth. Yet the microscopic mechanisms determining this growth are far from understood. In the past few years there has been substantial progress in understanding the mechanisms that determine how particles move in turbulence, albeit mostly for simplified model systems. The challenge is now to understand how these mechanisms lead to rapid particle growth.

This school, intended for PhD students and junior researchers in quantum phenomena and condensed matter physics, will consist of short courses on topics from Short courses from Quantum Matter, Quantum Information and Quantum Sensing, from theory to computations and experimental results.

A week of workshops at the frontiers of quantum physics. Hosted by Frank Wilczek in collaboration with Stockholm University, Nordita and Wilczek Quantum Center at Shanghai Jiao Tong University. This year, the Workshop will coincide with a Nobel Symposium on Chiral Materials.

The program will bring together leading researchers to work together on the outstanding open problems on frontiers of superconductivity and magnetism. Special focus will be on the interplay of real- and momentum-space topology and strong correlations.

Equilibrium statistical physics provides an extremely powerful, universal formalism that tells us how many-particle systems in thermal equilibrium behave, and how we can characterize their properties by only a few macroscopic quantities. However, most systems and processes found in nature are out of equilibrium. Think of any living organism, or directed transport in cells mediated by molecular motors. Often these systems consist of only a few entities and are so small that thermal fluctuations play a prominent role. It has been a vision from the early days of statistical mechanics to develop a theoretical description for such small non-equilibrium systems that is comparably powerful and universal as is equilibrium statistical physics. The aim of this program is to bring together the leading experts in (non-equilibrium) statistical physics to critically discuss and evaluate the latest developments towards a universal theory for non-equilibrium systems.