A spectral ansatz for the long-time homogenization of the wave equation
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911780844863488 |
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| author | Duerinckx, Mitia Gloria, Antoine Ruf, Matthias |
| author_facet | Duerinckx, Mitia Gloria, Antoine Ruf, Matthias |
| contents | Consider the wave equation with heterogeneous coefficients in the homogenization regime. At large times, the wave interacts in a nontrivial way with the heterogeneities, giving rise to effective dispersive effects. The main achievement of the present work is a new ansatz for the long-time two-scale expansion inspired by spectral analysis. Based on this spectral ansatz, we extend and refine all previous results in the field, proving homogenization up to optimal timescales with optimal error estimates, and covering all the standard assumptions on heterogeneities (both periodic and stationary random settings). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_07684 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A spectral ansatz for the long-time homogenization of the wave equation Duerinckx, Mitia Gloria, Antoine Ruf, Matthias Analysis of PDEs Mathematical Physics 35B27, 35B40, 35C20, 35L05, 74Q10, 74Q15, 74H40, 35B30, 35P05 Consider the wave equation with heterogeneous coefficients in the homogenization regime. At large times, the wave interacts in a nontrivial way with the heterogeneities, giving rise to effective dispersive effects. The main achievement of the present work is a new ansatz for the long-time two-scale expansion inspired by spectral analysis. Based on this spectral ansatz, we extend and refine all previous results in the field, proving homogenization up to optimal timescales with optimal error estimates, and covering all the standard assumptions on heterogeneities (both periodic and stationary random settings). |
| title | A spectral ansatz for the long-time homogenization of the wave equation |
| topic | Analysis of PDEs Mathematical Physics 35B27, 35B40, 35C20, 35L05, 74Q10, 74Q15, 74H40, 35B30, 35P05 |
| url | https://arxiv.org/abs/2303.07684 |