SAMOP 2021 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 12: Quantum Simulation and Many-Body Systems

QI 12.1: Hauptvortrag

Freitag, 24. September 2021, 10:45–11:15, H3

Emergent Hilbert-space fragmentation in tilted Fermi-Hubbard chains — •Monika Aidelsburger — Fakultät für Physik, Ludwig-Maximilians-Universität Munich, Germany — Munich Center for Quantum Science and Technology (MCQST) Munich, Germany

Well-controlled synthetic quantum systems, such as ultracold atoms in optical lattices, offer intriguing possibilities to study complex many-body problems relevant to a variety of research areas, ranging from condensed matter to statistical physics. In particular, out-of-equilibrium phenomena constitute natural applications of quantum simulators, which have already successfully demonstrated simulations in regimes that are beyond reach using state-of-the-art numerical techniques. This enables us to shed new light on fundamental questions about the thermalization of isolated quantum many-body systems. While generic models are expected to thermalize according to the eigenstate thermalization hypothesis (ETH), violation of ETH is believed to occur mainly in two types of systems: integrable models and manybody localized systems. In between these two extreme limits, there is, however, a whole range of models that exhibit more complex dynamics, for instance, due to an emergent fragmentation of the many-body Hilbert space. A versatile platform that paves the way towards studying this rich variety of (weak) ergodic-breaking phenomena is the 1D Fermi-Hubbard model with a strong linear potential (tilt).