Flavour-selective localization in interacting lattice fermions via SU(N) symmetry breaking
| Autor: | Massimo Capone, Daniele Tusi, Lorenzo Del Re, Tianwei Zhou, G. Cappellini, Karla Baumann, Rafael Emilio Barfknecht, Leonardo Fallani, Daniel Benedicto-Orenes, Jacopo Catani, Massimo Inguscio, Lorenzo Franchi, Lorenzo Livi |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Quantum Physics Strongly Correlated Electrons (cond-mat.str-el) Mott insulator Quantum simulator FOS: Physical sciences Fermion Condensed Matter - Strongly Correlated Electrons Atomic orbital Quantum state Quantum Gases (cond-mat.quant-gas) Topological insulator Quantum mechanics Quantum system Condensed Matter::Strongly Correlated Electrons Symmetry breaking Condensed Matter - Quantum Gases Quantum Physics (quant-ph) |
| DOI: | 10.48550/arxiv.2104.13338 |
| Popis: | 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. Comment: Main Text: 5 pages, 4 figures. Supplementary Material: 6 pages, 6 figures |
| Databáze: | OpenAIRE |
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