External website: https://agenda.infn.it/event/39803

Quantum field theories are often defined in terms of local operators and their correlation functions. But a much richer set of observables includes probes which are extended in space and time, such as heavy impurities, boundaries or interfaces, and which are referred to collectively as defects. Defects also appear when studying entanglement between subregions of space, and even when modeling the interface between strongly and weakly gravitating regions of spacetime. They are studied by most communities in theoretical physics: from condensed matter and statistical mechanics to particle physics, holography and quantum information. Correspondingly, all the available tools in Quantum Field Theory have been applied to this subject: perturbation theory, lattice, conformal bootstrap, holographic methods, supersymmetric localization, and more. The need for transfer of knowledge and collaboration between these communities is pressing. This is the challenge the workshop wants to address, by bringing together some of the world-best experts in their respective research field

External website: https://agenda.infn.it/event/39804

Numerous solid-state materials such as quantum magnets, van der Waals bilayers, and strongly correlated conductors are described by strongly coupled field theories involving dynamic gauge fields, and fractionalized quasi particles, both in the continuum and in the lattice limits. Three-dimensional compact quantum electrondynamics, a non-trivial conformal field theory, is seen to emerge as the ground state of the frustrated spin-1/2 antiferromagnet on the triangular lattice. This heralds the beginning of a range of broader and deeper connections between field theory, microscopics, and experiment. This workshop aims at exploring these fascinating interconnections and to bring together experts from high-energy physics, relativistic hydrodynamics, condensed matter theorists, and computational physicists to synthesize and advance theories of exotic quantum matter.

External website: https://agenda.infn.it/event/39805

Gravitational waves (GWs) from compact binaries have been detected in the kHz regime, and Pulsar Timing Arrays are revealing a GW background in the nHz band. Experimental ideas spanning from nHz to MHz are being explored to cover the gravitational spectrum. This is an exciting time to explore what GWs can uncover about fundamental physics and cosmology by detecting astrophysical and primordial GW sources, as well as exploring effects that could be induced by various Dark Matter candidates. This workshop will unite astrophysicists, cosmologists, and particle physicists to discuss open questions and define theoretical targets, guiding the field in experimental strategies across the gravitational spectrum to learn about our Universe