Particle zoo in a doped spin chain: Correlated states of mesons and magnons
arXiv:2210.02320 · doi:10.1103/PhysRevB.107.035105
Abstract
It is a widely accepted view that the interplay of spin- and charge-degrees of freedom in doped antiferromagnets (AFMs) gives rise to the rich physics of high-temperature superconductors. Nevertheless, it remains unclear how effective low-energy degrees of freedom and the corresponding field theories emerge from microscopic models, including the and Hubbard Hamiltonians. A promising view comprises that the charge carriers have a rich internal parton structure on intermediate scales, but the interplay of the emergent partons with collective magnon excitations of the surrounding AFM remains unexplored. Here we study a doped one-dimensional spin chain in a staggered magnetic field and demonstrate that it supports a zoo of various long-lived excitations. These include magnons; mesonic pairs of spinons and chargons, along with their ro-vibrational excitations; and tetra-parton bound states of mesons and magnons. We identify these types of quasiparticles in various spectra using DMRG simulations. Moreover, we introduce a strong-coupling theory describing the polaronic dressing and molecular binding of mesons to collective magnon excitations. The effective theory can be solved by standard tools developed for polaronic problems, and can be extended to study similar physics in two-dimensional doped AFMs in the future. Experimentally, the doped spin-chain in a staggered field can be directly realized in quantum gas microscopes.
arXiv comment19 pages, 14 figures, 5 appendices
References in corpus (52)
- Single-Spin Addressing in an Atomic Mott Insulator
- Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
- Time-evolution methods for matrix-product states
- Using photoemission spectroscopy to probe a strongly interacting Fermi gas
- The Confinement Problem in Lattice Gauge Theory
- Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
- A Quantum Gas Microscope for Fermionic Atoms
- Time-evolving a matrix product state with long-ranged interactions
- Observation of Correlated Particle-Hole Pairs and String Order in Low-Dimensional Mott Insulators
- Field-theoretical study of the Bose polaron
- Fractional excitations in the square-lattice quantum antiferromagnet
- Observation of a pairing pseudogap in a two-dimensional Fermi gas
- Revealing Hidden Antiferromagnetic Correlations in Doped Hubbard Chains via String Correlators
- Ultra-cold Polarized Fermi Gases
- Probing quench dynamics across a quantum phase transition into a 2D Ising antiferromagnet
- Imaging magnetic polarons in the doped Fermi-Hubbard model
- String patterns in the doped Hubbard model
- Spin Transport in a Mott Insulator of Ultracold Fermions
- Spin dynamics in a one-dimensional ferromagnetic Bose gas
- The phase diagram of the anisotropic spin-2 XXZ model: an infinite system DMRG study
- Exploration of doped quantum magnets with ultracold atoms
- Time-Resolved Observation of Spin-Charge Deconfinement in Fermionic Hubbard Chains
- Nearly deconfined spinon excitations in the square-lattice spin-1/2 Heisenberg antiferromagnet
- Variational Study of Fermionic and Bosonic Systems with Non-Gaussian States: Theory and Applications
- Electronic structure of the quasi-one-dimensional organic conductor TTF-TCNQ
- Single hole dynamics in the t-J model on a square lattice
- Parton theory of magnetic polarons: Mesonic resonances and signatures in dynamics
- Confined phases of one-dimensional spinless fermions coupled to gauge theory
- Strong quantum interactions prevent quasiparticle decay
- Single hole spectral function and spin-charge separation in the t-J model
- Geometry and the Hidden Order of Luttinger Liquids: the Universality of Squeezed Space
- Coupling a mobile hole to an antiferromagnetic spin background: Transient dynamics of a magnetic polaron
- Bose polaron as an instance of quantum Brownian motion
- Evidence for composite nature of quasiparticles in the 2D t-J model
- Angle-resolved photoemission spectroscopy with quantum gas microscopes
- Transport of strong-coupling polarons in optical lattices
- Angle-resolved photoemission spectroscopy of a Fermi-Hubbard system
- Parton theory of ARPES spectra in anti-ferromagnetic Mott insulators
- Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators
- Quantum Dynamics of the Square-Lattice Heisenberg Model
- Meson formation in mixed-dimensional t-J models
- Evaluation of time-dependent correlators after a local quench in iPEPS: hole motion in the t-J model
- Confinement and Mott transitions of dynamical charges in 1D lattice gauge theories
- Dynamical quantum Cherenkov transition of fast impurities in quantum liquids
- Enhanced Superexchange in a Tilted Mott Insulator
- Bloch oscillations of bosonic lattice polarons
- Dynamical formation of a magnetic polaron in a two-dimensional quantum antiferromagnet
- Z2 parton phases in the mixed-dimensional model
- Nonequilibrium Hole Dynamics in Antiferromagnets: Damped Strings and Polarons
- Unusual Two-stage Dynamics of the Spin-Lattice Polaron Formation
- A variational approach for many-body systems at finite temperature
- Rotational Resonances and Regge Trajectories in Lightly Doped Antiferromagnets