Low-energy doublons in the ac-driven two-species Hubbard model

Abstract

The hopping dynamics of two fermionic species with different effective masses in the one-dimensional Hubbard model driven by an external field is theoretically investigated. A multiple-time-scale asymptotic analysis of the driven asymmetric Hubbard model shows that a high-frequency bichromatic external field can sustain a new kind of low-energy particle bound state (doublon), in which two fermions of different species occupy nearest neighbor sites and co-tunnel along the lattice. The predictions of the asymptotic analysis are confirmed by direct numerical simulations of the two-particle Hubbard Hamiltonian.

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Cited by in corpus (8)

• Effective Hamiltonians for fastly driven many-body lattice systems
• Topological bound states in interacting Su-Schrieffer-Heeger rings
• Phase transitions and bunching of correlated particles in a non-Hermitian quasicrystal
• Spectral structure and doublon dissociation in the two-particle non-Hermitian Hubbard model
• Two-doublon Bloch oscillations in the mass-imbalanced extended Fermi-Hubbard model
• Edge states in quantum spin chains: the interplay among interaction, gradient magnetic field and Floquet engineering
• Resonant dynamics of spin cluster in a periodically driven one-dimensional Rydberg lattice
• Realizing non-trivial doublon formation using a quantum computer