Speaker
Description
We discuss unconventional transport phenomena in a spin-1 model that supports a tower of quantum many-body scars. In quantum many-body systems, the late-time dynamics of local observables are typically governed by conserved operators with local densities, such as energy and magnetization. In the model under investigation, however, there is an additional dynamical symmetry restricted to the subspace of the Hilbert space spanned by the quantum many-body scars. That significantly slows the decay of autocorrelation functions of certain coherent states and is responsible for an unconventional form of transport. We show that excited states with energy close to that of the quantum many-body scars play a crucial role in sustaining the transport. Finally, we propose a generalized eigenstate thermalization hypothesis to describe specific properties of states with energy close to the scars.
This work is based on [arXiv:2502.10387], a joint project with Gianluca Morettini, Maurizio Fagotti and Leonardo Mazza.
