Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model

• URL: http://arxiv.org/abs/2601.03694v1
• Date: Wed, 07 Jan 2026 08:29:53 GMT
• Title: Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model
• Authors: Zhen-Ting Bao, Kai Xu, Heng Fan,
• Abstract summary: We propose an optimized nearest-neighbor pair-hopping term that interferes with the dominant virtual hopping channel.<n>We show that this scheme achieves near-complete dynamical arrest and entanglement preservation in one-dimensional chains.<n>In the many-body regime, finite-size scaling analysis identifies the observed long-lived density-wave order as a prethermal plateau.
• Score: 14.934957602154233
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The coherent mobility of doublons, arising from second-order virtual dissociation-recombination processes, fundamentally limits their use as information carriers in the strongly interacting Bose-Hubbard model. We propose a disorder-free suppression mechanism by introducing an optimized nearest-neighbor pair-hopping term that destructively interferes with the dominant virtual hopping channel. Using the third-order Schrieffer-Wolff transformation, we derive an analytical optimal condition that accounts for lattice geometry corrections. Exact numerical simulations demonstrate that this optimized scheme achieves near-complete dynamical arrest and entanglement preservation in one-dimensional chains, while in two-dimensional square lattices, it significantly suppresses ballistic spreading yet permits a slow residual expansion. Furthermore, in the many-body regime, finite-size scaling analysis identifies the observed long-lived density-wave order as a prethermal plateau emerging from the dramatic separation of microscopic and thermalization timescales.

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