title: Observation of chiral edge states with neutral fermions in synthetic Hall ribbons.
abstract: Chiral edge states are a hallmark of quantum Hall physics. In electronic systems, they appear as a macroscopic consequence of the cyclotron orbits induced by a magnetic field, which are naturally truncated at the physical boundary of the sample. Here we report on the experimental realization of chiral edge states in a ribbon geometry with an ultracold gas of neutral fermions subjected to an artificial gauge field. By imaging individual sites along a synthetic dimension, encoded in the nuclear spin of the atoms, we detect the existence of the edge states and observe the edge-cyclotron orbits induced during quench dynamics. The realization of fermionic chiral edge states opens the door for edge state interferometry and the study of non-Abelian anyons in atomic systems.
authors.affiliation: Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Mancini
authors.affiliation: Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Pagano
authors.affiliation: European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Cappellini
authors.affiliation: European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Livi
authors.affiliation: Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria. Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Rider
authors.affiliation: Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), Sezione di Sesto Fiorentino, I-50019 Sesto Fiorentino, Italy. European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy.
authors.forename: J
authors.initials: J
authors.lastname: Catani
authors.affiliation: Istituto Nazionale di Ricerca Metrologica (INRIM), I-10135 Torino, Italy. European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Sias
authors.affiliation: Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria. Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: P
authors.initials: P
authors.lastname: Zoller
authors.affiliation: Istituto Nazionale di Ricerca Metrologica (INRIM), I-10135 Torino, Italy. Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy. European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Inguscio
authors.affiliation: Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria. Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Dalmonte
authors.affiliation: Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy. European Laboratory for Non-Linear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Italy. fallani@lens.unifi.it.
authors.forename: L
authors.initials: L
authors.lastname: Fallani