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.

Main Text: 5 pages, 4 figures. Supplementary Material: 6 pages, 6 figures

References in corpus (7)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• A one-dimensional liquid of fermions with tunable spin
• An SU(N) Mott insulator of an atomic Fermi gas realized by large-spin Pomeranchuk cooling
• Ultracold Fermi Gases with Emergent SU(N) Symmetry
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Cited by in corpus (35)

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• Metal-insulator transition and quantum magnetism in the SU(3) Fermi-Hubbard Model: Disentangling Nesting and the Mott Transition
• Many-body Physics of Ultracold Alkaline-Earth atoms with SU($N$)-symmetric interactions
• SU(N) magnetism with ultracold molecules
• Exact eigenstates of multicomponent Hubbard models: SU($N$) magnetic $\eta$ pairing, weak ergodicity breaking, and partial integrability
• Quasilocal entanglement across the Mott-Hubbard transition
• Enhancement of chiral edge currents in ($d$+1)-dimensional atomic Mott-band hybrid insulators
• Ideal flat and resolved SU(3) Landau levels in three dimensions
• Coherent control over the high-dimensional space of the nuclear spin of alkaline-earth atoms
• Site-selective doublon-holon dynamics in a pumped one-dimensional Hubbard superlattice with staggered Coulomb interactions
• Relation between the noise correlations and the spin structure factor for Mott-insulating states in SU$(N)$ Hubbard models
• A generalized effective spin-chain formalism for strongly interacting spinor gases in optical lattice
• Measuring Hall voltage and Hall resistance in an atom-based quantum simulator
• Microsecond-scale high-survival and number-resolved detection of ytterbium atom arrays
• Next-generation EDIpack: A Lanczos-based package for quantum impurity models featuring general broken-symmetry phases, flexible bath topologies and multi-platform interoperability
• Combinatorial summation of Feynman diagrams: Equation of state of the 2D SU(N) Hubbard model
• The Fractal-Lattice Hubbard Model
• Many-body correlations in one-dimensional optical lattices with alkaline-earth(-like) atoms
• The SU(N) Fermi-Hubbard Model on two sites: Bethe Ansatz solution and Quantum Phase Transition of the Lipkin-Meshkov-Glick Model in the large-N limit
• Itinerant ferromagnetism in an SU(3) Fermi-Hubbard model at finite temperatures: A dynamical mean-field theory study
• Structural complexity of snapshots of 2D Fermi-Hubbard systems
• Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions
• Partial suppression of magnetism in the square lattice SU(3) Hubbard model
• Competition between Neel, Haldane nematic, plaquette valence bond solid, and $(\pi ,\pi )$ valence bond solid phases in SU(N) analogs of $S=1$ square-lattice antiferromagnets
• Ground State Phase Diagram of $\text{SU}(3)$ $t$-$J$ Chain
• Density Matrix Renormalization Group simulations of the SU(N) Fermi-Hubbard chain implementing the full SU(N) symmetry via Semi-Standard Young Tableaux and Unitary Group Subduction Coefficients
• Solving the SU($N$) Orbital Hatsugai-Kohmoto Model
• Unit-density SU(3) Fermi-Hubbard Model with Spin Flavor Imbalance
• Trion ordering in the attractive three-color Hubbard model on a $\pi$-flux square lattice
• Trion formation and ordering in the attractive SU(3) Fermi-Hubbard model
• Magnetic correlations in the $SU(3)$ triangular-lattice $t$-$J$ model at finite doping
• Entanglement-enhanced correlation propagation in the one-dimensional SU($N$) Fermi-Hubbard model
• Superconductor-Insulator transition in a two-orbital attractive Hubbard model with Hund's exchange