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Spin Phenomena Interdisciplinary Center (SPICE)

Unconventional superconductors are materials that exhibit superconductivity beyond the framework of BCS or Migdal–Eliashberg theories, often characterized by novel broken symmetries in addition to the usual U(1) gauge symmetry breaking. A parallel development has recently emerged in magnetism with the discovery of altermagnets—materials with collinear but compensated magnetic order that defy classification as either conventional ferromagnets or antiferromagnets. Together, these phenomena highlight some of the most exciting frontiers in quantum materials research, offering both fundamental challenges and promising pathways toward future quantum technologies. This workshop will bring together leading experimentalists and theorists to discuss the latest developments in unconventional superconductors and magnets across a broad range of materials platforms.

Max Planck Institute for the Physics of Complex Systems, Dresden

Physique mathématique,    Mécanique quantique et technologie quantique

Wilhelm and Else Heraeus-Foundation

Since the first experimental realization of Bose-Einstein condensation in ultracold atomic gases in 1995, there have been several substantial breakthroughs. Today, systems of bosonic or fermionic quantum gases allow for an unprecedented high level of experimental control concerning all ingredients of the underlying many-body Hamiltonian. Therefore, ultracold atomic or molecular quantum gases are considered to be ideal both for quantum simulators and quantum computations. Thus, they are best capable to simulate difficult problems in quantum many-body physics as they occur in condensed matter physics and other fields of physics and at the same time allow for developing architectures for quantum computers, which will ultimately surpass classical computers.

Since the first experimental realization of Bose-Einstein condensation in ultracold atomic gases in 1995, there have been several substantial breakthroughs. Today, systems of bosonic or fermionic quantum gases allow for an unprecedented high level of experimental control concerning all ingredients of the underlying many-body Hamiltonian. Therefore, ultracold atomic or molecular quantum gases are considered to be ideal both for quantum simulators and quantum computations. Thus, they are best capable to simulate difficult problems in quantum many-body physics as they occur in condensed matter physics and other fields of physics and at the same time allow for developing architectures for quantum computers, which will ultimately surpass classical computers. In response to the occurrence of many new research directions in recent years, it is highly desirable to give a coherent overview over the diverse facets which are now appearing, and to reflect upon the future perspectives of the field.

Forschungszentrum Jülich

The goal of this year’s school is to provide students with an overview of modern many-body methods and their application to materials, with an outlook to the future of many-body simulations. The program will start with introducing the fundamentals: density-functional theory, the many-body problem and its complexity, emergent phenomena, the Hubbard and Kondo models and their physics. More advanced lectures will introduce many-body methods: static and dynamical mean-field theories, cluster methods, DMRG, tensor networks, and machine learning. Additional lectures will cover more explorative approaches, such as variational methods suitable for quantum computers and many-body solvers exploiting artificial neural networks. The lectures will show how the approaches can be used to unravel the mechanism of paradigmatic emergent phenomena in materials: non-conventional superconductivity, Mott phases, orbital ordering, topological phases of matter, the quantum Hall effect, and quantum spin-liquid phenomena. The topics will be treated with a focus on explaining key experiments in a realistic setting and an outlook on questions of materials design. Dedicated experimental lectures will explain the complexity of crystal-growth, cover experimental methods for characterizing many-body phases as well as experimental equilibrium and out-of-equilibrium probes of many-body states.

Email.: correl26@fz-juelich.de

strongly correlated systems, Hubbard model, phase transitions; neural quantum states, many-body methods, QMC, DMFT and DFT+DMFT, Quantum Many-body Simulations on Digital Quantum Computer, RIXS experiments, Lanczos Method, Light-Control of Many-Body Phases, Quantum Spin Liquids, Topological Phases, DMRG, Ginzburg-Landau Theory of Superconductivity, Variational Monte Carlo.

Physique de la matière condensée et des matériaux,    Physique numérique