Year: 2024
Type: article
Abstract: We analyze the formation of multiparticle bound states in ladders with frustrated kinetic energy in two-component bosonic and two-component fermionic systems. We focus on the regime of light doping relative to insulating states at half-filling, spin polarization close to 100%, and strong repulsive interactions. A special feature of these systems is that the binding energy scales with single-particle tunneling t rather than exchange interactions, since effective attraction arises from alleviating kinetic frustration. For two-component Fermi systems on a zigzag ladder we find a bound state between a hole and a flipped spin (magnon) with a binding energy that can be as large as 0.6t . We demonstrate that magnon-hole attraction leads to formation of clusters comprising several holes and magnons, and we expound on antiferromagentic correlations for the transverse spin components inside the clusters. We identify several many-body states that result from self-organization of multiparticle bound states, including a Luttinger liquid of hole-magnon pairs and a density wave state of two-hole–three-magnon composites. We establish a symmetry between the spectra of Bose and Fermi systems and use it to establish the existence of antibound states in two-component Bose mixtures with SU(2) symmetric repulsion on a zigzag ladder. We also consider Bose and Fermi systems on a square ladder with flux and demonstrate that both systems support bound states. We discuss experimental signatures of multiparticle bound states in both equilibrium and dynamical experiments. We point out intriguing connections between these systems and the quark bag model in QCD. Published by the American Physical Society 2024
Source: Physical Review Research
Institutions: Institut de Ciències del Cosmos, Universitat de Barcelona, Harvard University, Center for Astrophysics Harvard & Smithsonian, Munich Center for Quantum Science and Technology, Technical University of Munich, MIT-Harvard Center for Ultracold Atoms, Massachusetts Institute of Technology, Stanford University, ETH Zurich, Institute for Theoretical Physics
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: National Science Foundation, Smithsonian Institution, Harvard University, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Generalitat de Catalunya, Ministerio de Ciencia e Innovación, Smithsonian Astrophysical Observatory, Center for Ultracold Atoms, Massachusetts Institute of Technology, European Regional Development Fund, Agencia Estatal de Investigación, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Army Research Office
Awards: G1175115578, G2064873908, G2145771558, G2262748287, G2601397997, G3005324705, G300979063, G3275705967, Characterization of biomolecular sequence patterns by profiles: Improvement of current methodology and development of a database, G3480869486, G3589210170, G3681454997, G3746636746, G3775377788, G4042783231, G410571670, G425668148, G451917667, G5080475149, G5195188938, G5199606742, Collaborative Research: Understanding Subatomic-Scale Quantum Matter Data Using Machine Learning Tools, G5539308778, G5967599077, G6149125829, Non-perturbative approaches to strongly correlated many-body systems, G645816665, EAGER-QAC-QCH: Hybrid Quantum Classical Algortithm for NMR Inference, G6705065423, G7084143925, G7452299184, G753033515, G7736885172
OpenAlex ID: W4398184032