Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Long-range Interactions

Q 42.1: Hauptvortrag

Donnerstag, 14. März 2024, 11:00–11:30, HS 1015

Theory of robust quantum many-body scars in long-range interacting systems — •Silvia Pappalardi — 77, Zulpicher Strasse, D-50937 Cologne

Quantum many-body scars are exceptional energy eigenstates of quantum many-body systems associated with violations of thermalization for special non-equilibrium initial states. Their various systematic constructions require fine-tuning of local Hamiltonian parameters. In this talk, I will show that the setting of long-range interacting quantum spin systems generically hosts robust quantum many-body scars. I will discuss that this is the combined effect of two ingredients: the integrability of the classical collective limit and the sufficiently strong long-range of the interactions. Broader perspectives of this work range from independent applications of the technical toolbox developed here to informing experimental routes to metrologically useful multipartite entanglement.

Keywords: Quantum thermalization; Quantum Many Body Scars; Long-range interacting systems