Past two decades have witnessed a lively development of the field of the nonequilibrium quantum physics. The development has been driven both by the advances on the experimental side, where modern ultra cold atom experiments enable us to measure the dynamics at very short time scales, and on the theoretical side where the rapid development of tensor network algorithms and integrability theory enable us to compute many nonequilibrium aspects that had been difficult to access previously. One of the key nonequilibrium properties of quantum systems has been the horizon spreading of correlations. Preparing a quantum system in a nonequilibrium state and letting it evolve will generally trigger nonequilibrium time evolution of the system. If the correlations in the initial state are short range, the horizon bound tells us that the correlations will be spreading within the light-cone in such a dynamics. This has been demonstrated theoretically in experimentally in many discrete (lattice) systems and thus believed to be a generally valid property of quantum systems. Interestingly, it turns out that the physics can be different in continuous systems (quantum field theories) given that the fields have nontrivial topologies.
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Participante: Dr. Ivan Kukuljan
Institución: Max-Planck-Institute for Quantum Optics, Germany
Fecha y hora: Este evento terminó el Miércoles, 05 de Mayo de 2021