Theory of antibound states in partially filled narrow band systems

Abstract

We present a theory of the dynamical two-particle response function in the Hubbard model based on the time-dependent Gutzwiller approximation. The results are in excellent agreement with exact diagonalization on small clusters and give reliable results even for high densities, where the usual ladder approximation breaks down. We apply the theory to the computation of antibound states relevant for Auger spectroscopy and cold atom physics. A special bonus of the theory is its computational simplicity.

arXiv comment4 pages, 3 figures

References in corpus (4)

• Repulsively bound atom pairs in an optical lattice
• High-temperature superfluidity of fermionic atoms in optical lattices
• Time-dependent Gutzwiller approximation for the Hubbard model
• Inhomogeneous Gutzwiller approximation with random phase fluctuations for the Hubbard model

Cited by in corpus (21)

• Dynamical and Topological Properties of the Kitaev Model in a [111] Magnetic Field
• Charge instabilities and electron-phonon interaction in the Hubbard-Holstein model
• Linear-Response Dynamics from the Time-Dependent Gutzwiller Approximation
• Two-particle photoemission from strongly correlated systems: A dynamical-mean field approach
• Stripes in cuprate superconductors: Excitations and dynamic dichotomy
• Time-Dependent Gutzwiller Theory for Multiband Hubbard Models
• Numerical minimisation of Gutzwiller energy functionals
• Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model
• Coexistence of Nematic Order and Superconductivity in the Hubbard Model
• Phonon renormalization from local and transitive electron-lattice couplings in strongly correlated systems
• Quantum fluctuations beyond the Gutzwiller approximation
• Frustrated collisions and unconventional pairing on a quantum superlattice
• Solving lattice density functionals close to the Mott regime
• Non-equilibrium dynamics across the BEC-BCS crossover
• Engineering Higgs dynamics by spectral singularities
• The time-dependent Gutzwiller theory for multi-band Hubbard models
• Strength of Correlations in a Silver Based Cuprate Analogue
• Long-lived Higgs modes in strongly correlated condensates
• Exact response functions within the time-dependent Gutzwiller approach
• Phase separation and pairing fluctuations in oxide materials
• Efficient slave-boson approach for multiorbital two-particle response functions and superconductivity