Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866916029708369920 |
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| author | Bao, Zhen-Ting Xu, Kai Fan, Heng |
| author_facet | Bao, Zhen-Ting Xu, Kai Fan, Heng |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_03694 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model Bao, Zhen-Ting Xu, Kai Fan, Heng Quantum Gases Statistical Mechanics Quantum Physics 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. |
| title | Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model |
| topic | Quantum Gases Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2601.03694 |