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Dynamical constraints, metastability and many-body localisation

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If you have a question about this talk, please contact Dr G Moller.

I will consider the general problem of slow relaxation and non-ergodicity in interacting quantum systems, and in particular many-body localization (MBL) which has emerged as a novel paradigm for robust ergodicity breaking in closed quantum many-body systems with quenched disorder. I will address these issues using ideas borrowed from the dynamics of classical glasses, where slow relaxation is a consequence of dynamical constraints rather than imposed disorder. I will show how such constraints can give rise to slow relaxation and metastability in closed quantum systems evolving unitarily. For sufficiently strong constraints dynamics can display signatures associated with MBL , even in the absence of quenched disorder. I will also address what aspects of MBL survive in the presence of dissipation to an environment.

This talk is part of the Theory of Condensed Matter series.

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