Observation of universal Hall response in strongly interacting Fermions

Year: 2023

Authors: Zhou TW., Cappellini G., Tusi D., Franchi L., Parravicini J., Repellin C., Greschner S., Inguscio M., Giamarchi T., Filippone M., Catani J., Fallani L.

Autors Affiliation: Univ Florence, Dept Phys & Astron, I-50019 Sesto Fiorentino, Italy; Ist Nazl Ottica Consiglio Nazl Ric CNR INO, Sez Sesto Fiorentino, I-50019 Sesto Fiorentino, Italy; European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy; Univ Grenoble Alpes, CNRS, LPMMC, F-38000 Grenoble, France; Univ Geneva, Dept Quantum Matter Phys, CH-1211 Geneva, Switzerland; Campus Biomed Univ Rome, Dept Engn, I-00128 Rome, Italy; Univ Grenoble Alpes, CEA, IRIG MEM L SIM, F-38000 Grenoble, France.

Abstract: The Hall effect, which originates 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 this work, we used an atomic quantum simulator in which we tracked the motion of ultracold fermions in two-leg ribbons threaded by artificial magnetic fields. Through controllable quench dynamics, we measured the Hall response for a range of synthetic tunneling and atomic interaction strengths. We unveil a universal interaction-independent behavior above an interaction threshold, in agreement with theoretical analyses. The ability to reach hard-to-compute regimes demonstrates the power of quantum simulation to describe strongly correlated topological states of matter.

Journal/Review: SCIENCE

Volume: 381 (6656)      Pages from: 427  to: 430

More Information: We acknowledge financial support from the Topology and Symmetries in Synthetic Fermionic Systems (TOPSIM) European Research Council (ERC) Consolidator Grant 682629, the TOPSPACE MIUR FARE project, Quantum Technologies For LAttice Gauge (QTFLAG) QuantERA ERA-NET Cofund in Quantum Technologies, and MIUR PRIN project 2017E44HRF. This work was supported in part by the Swiss National Science Foundation under Division II grant 200020-188687. M.F. acknowledges support from Swiss National Science Foundation/Schweizerischer Nationalfonds (FNS/SNF) Ambizione grant PZ00P2_174038 and the EPiQ ANR-22-PETQ-0007 part of Plan France 2030.
KeyWords: Topological Quantum Matter; Density; Phase
DOI: 10.1126/science.add1969

ImpactFactor: 44.700
Citations: 12
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