Emergent interaction-induced topology in Bose-Hubbard ladders

verfasst von: David Wellnitz, Gustavo A. Domínguez-Castro, Thomas Bilitewski, Monika Aidelsburger, Ana Maria Rey, Luis Santos
Abstract: We investigate the quantum many-body dynamics of bosonic atoms hopping in a two-leg ladder with strong on-site contact interactions. We observe that when the atoms are prepared in a staggered pattern with pairs of atoms on every other rung, singlon defects, i.e., rungs with only one atom, can localize due to an emergent topological model, even though the underlying model in the absence of interactions admits only topologically trivial states. This emergent topological localization results from the formation of a zero-energy edge mode in an effective lattice formed by two adjacent chains with alternating strong and weak hoping links (Su-Schrieffer-Heeger chains) and opposite staggering which interface at the defect position. Our findings open the opportunity to dynamically generate nontrivial topological behaviors without the need for complex Hamiltonian engineering.
Organisationseinheit(en): Fakultät für Mathematik und Physik
Externe Organisation(en): Joint Institute for Laboratory Astrophysics (JILA)
University of Colorado Boulder
Oklahoma State University
Max-Planck-Institut für Quantenoptik (MPQ)
Ludwig-Maximilians-Universität München (LMU)
Munich Center for Quantum Science and Technology (MCQST)
Typ: Artikel
Journal: Physical Review Research
Band: 7
ISSN: 2643-1564
Publikationsdatum: 17.01.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemeine Physik und Astronomie
Elektronische Version(en): https://doi.org/10.48550/arXiv.2409.05109 (Zugang: Offen)
https://doi.org/10.1103/PhysRevResearch.7.L012012 (Zugang: Offen)

BibTeX

@article{61d3635fbcdf4d038ef38456ceba6f88,
title = "Emergent interaction-induced topology in Bose-Hubbard ladders",
abstract = "We investigate the quantum many-body dynamics of bosonic atoms hopping in a two-leg ladder with strong on-site contact interactions. We observe that when the atoms are prepared in a staggered pattern with pairs of atoms on every other rung, singlon defects, i.e., rungs with only one atom, can localize due to an emergent topological model, even though the underlying model in the absence of interactions admits only topologically trivial states. This emergent topological localization results from the formation of a zero-energy edge mode in an effective lattice formed by two adjacent chains with alternating strong and weak hoping links (Su-Schrieffer-Heeger chains) and opposite staggering which interface at the defect position. Our findings open the opportunity to dynamically generate nontrivial topological behaviors without the need for complex Hamiltonian engineering.",
author = "David Wellnitz and Dom{\'i}nguez-Castro, {Gustavo A.} and Thomas Bilitewski and Monika Aidelsburger and Rey, {Ana Maria} and Luis Santos",
note = "Publisher Copyright: {\textcopyright} 2025 authors. Published by the American Physical Society.",
year = "2025",
month = jan,
day = "17",
doi = "10.48550/arXiv.2409.05109",
language = "English",
volume = "7",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "1",
}