Flavour-selective localization in interacting lattice fermions via SU(N) symmetry breaking
Abstract
A large repulsion between particles in a quantum system can lead to their localization, as it happens for the electrons in Mott insulating materials. This paradigm has recently branched out into a new quantum state, the orbital-selective Mott insulator, where electrons in some orbitals are predicted to localize, while others remain itinerant. We provide a direct experimental realization of this phenomenon, that we extend to a more general flavour-selective localization. By using an atom-based quantum simulator, we engineer SU(3) Fermi-Hubbard models breaking their symmetry via a tunable coupling between flavours, observing an enhancement of localization and the emergence of flavour-dependent correlations. Our realization of flavour-selective Mott physics opens the path to the quantum simulation of multicomponent materials, from superconductors to topological insulators.
Keywords
Cite
@article{arxiv.2104.13338,
title = {Flavour-selective localization in interacting lattice fermions via SU(N) symmetry breaking},
author = {Daniele Tusi and Lorenzo Franchi and Lorenzo Francesco Livi and Karla Baumann and Daniel Benedicto Orenes and Lorenzo Del Re and Rafael Emilio Barfknecht and Tianwei Zhou and Massimo Inguscio and Giacomo Cappellini and Massimo Capone and Jacopo Catani and Leonardo Fallani},
journal= {arXiv preprint arXiv:2104.13338},
year = {2022}
}
Comments
Main Text: 5 pages, 4 figures. Supplementary Material: 6 pages, 6 figures