Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Observation of Universal Hall Response in Strongly Interacting Fermions

Not scheduled
1h 30m
Abstract of recent or ongoing work (by remote / virtual participant) Degenerate gases, many-body physics, and quantum simulation Abstracts by remote participants


The Hall effect, originating from the motion of charged particles in magnetic fields, has deep consequences for the description of materials, extending far beyond condensed matter. Understanding such an effect in interacting systems represents a fundamental challenge, even for small magnetic fields. In a very recent work, we use an atomic quantum simulator to track the motion of ultracold fermionic 173^Yb atoms in two-leg ribbons threaded by artificial magnetic fields. We unveil a universal interaction-independent behavior above an interaction threshold, in agreement with theoretical analyses. More in detail, we monitor the real-time dynamics of the system following the instantaneous quench of a linear potential, which tilts the lattice along x and mimics the action of a longitudinal electric field Ex. We observe that the combined action of Ex and the synthetic magnetic flux φ triggers a longitudinal current Jx, accompanied by the Hall polarization of the system along the transverse direction. Through controllable quench dynamics, we measure the Hall response for a range of synthetic tunneling and atomic interaction strength. Our system, able to reach hard-to-compute regimes, also demonstrates the power of quantum simulation to investigate strongly correlated topological states of matter.

Presenter name Jacopo Catani
online poster URL https://doi.org/10.48550/arXiv.2205.13567
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Primary authors

Dr Tian Wei Zhou (LENS - University of Florence) Dr Giacomo Cappellini (CNR-INO & LENS, Sesto Fiorentino - Italy) Dr Daniele Tusi (LENS, Sesto Fiorentino - Italy) Dr Lorenzo Franchi (Department of Physics and Astronomy, University of Florence) Dr Jacopo Parravicini (Department of Physics and Astronomy, University of Florence & CNR-INO) Dr Cecile Repellin (Univ. Grenoble Alpes, CNRS, LPMMC) Dr Sebastian Greschner (Department of Quantum Matter Physics, University of Geneva,) Prof. Massimo Inguscio (Department of Engineering, Campus Bio-Medico University of Rome, CNR-INO & LENS) Prof. Thierry Giamarchi (Department of Quantum Matter Physics, University of Geneva,) Dr Michele Filippone (Univ. Grenoble Alpes, CEA, IRIG-MEM-L SIM) Jacopo Catani (CNR-INO & LENS - Florence - Italy) Prof. Leonardo Fallani (Department of Physics and Astronomy, University of Florence, CNR-INO & LENS)

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