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Host: Prof. Baiqing Lv
Zoom meeting link: https://zoom.us/j/94960724679?pwd=WntbMgbZachFaHizu9SjUH93TzXhHG.1
Zoom Meeting ID: 94960724679, password: 123456
Abstract:
We study a dephasing many-body open quantum system that hosts, together with the infinite-temperature state, another additional stationary state, that is associated with a nonextensive strong symmetry. This state, that is a pure dark state, is exceptional in that it retains memory of the initial condition, whereas any orthogonal state evolves toward the infinite-temperature state erasing any information on the initial state. We discuss the approach to stationarity of the model focusing in particular on the fate of interfaces between the two states, and we explain how the stationary-state manifold emerges from the algebraic properties of the local operators in the generator of the evolution. Moreover, we point out the reasons for considering these exceptional stationary states as quantum many-body scars in the open system framework.
Biography:
Dr. Lorenzo Gotta obtained his PhD at the University of Paris-Saclay in 2022, working mainly on pairing mechanisms leading to exotic phases of matter in one-dimensional quantum many-body systems. Afterwards, he moved to the University of Geneva to work as a postdoctoral research and teaching assistant in the group of Prof. Thierry Giamarchi, where his research specialized on the broad area of non-equilibrium quantum many-body dynamics, with a focus on quantum impurity dynamics, lack of thermalization through quantum many-body scars and dissipative quantum many-body systems.