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Explore two novel mechanisms that slow down thermalization in quantum many-body systems through this seminar by Ph.D. Igor Ermakov from the Steklov Mathematical Institute of RAS. Discover the first mechanism involving special initial states that exhibit almost complete revivals of local observables to their original values at predetermined moments, with applications in quantum sensing, quantum tomography, and quantum time capsules where classical information can only be retrieved at specific times. Learn about the second mechanism of quantum many-body scars, a recently observed phenomenon connected to unstable periodic trajectories that revisits Heller's original 1986 concept of scars. Examine how scarred quantum states in many-body systems with large spins can strongly influence the thermalization dynamics of fully polarized states. Gain insights into the classical counterpart of this phenomenon and evidence for observing Arnold diffusion in classical many-spin systems, understanding how these mechanisms arise in relatively generic physical systems and their association with specific initial states.
