Global existence of Lagrangian solutions to the ionic Vlasov--Poisson system
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910796301205504 |
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| author | Choi, Young-Pil Koo, Dowan Song, Sihyun |
| author_facet | Choi, Young-Pil Koo, Dowan Song, Sihyun |
| contents | In this paper, we establish the global existence of Lagrangian solutions to the ionic Vlasov--Poisson system under mild integrability assumptions on the initial data. Our approach involves proving the well-posedness of the Poisson--Boltzmann equation for densities in $L^p$ with $p>1$, introducing a novel decomposition technique that ensures uniqueness, stability, and improved bounds for the thermalized electron density. Using this result, we construct global-in-time Lagrangian solutions while demonstrating that the energy functional remains uniformly bounded by its initial value. Additionally, we show that renormalized solutions coincide with Lagrangian solutions, highlighting the transport structure of the system, and prove that renormalized solutions coincide with weak solutions under additional integrability assumptions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_13872 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Global existence of Lagrangian solutions to the ionic Vlasov--Poisson system Choi, Young-Pil Koo, Dowan Song, Sihyun Analysis of PDEs In this paper, we establish the global existence of Lagrangian solutions to the ionic Vlasov--Poisson system under mild integrability assumptions on the initial data. Our approach involves proving the well-posedness of the Poisson--Boltzmann equation for densities in $L^p$ with $p>1$, introducing a novel decomposition technique that ensures uniqueness, stability, and improved bounds for the thermalized electron density. Using this result, we construct global-in-time Lagrangian solutions while demonstrating that the energy functional remains uniformly bounded by its initial value. Additionally, we show that renormalized solutions coincide with Lagrangian solutions, highlighting the transport structure of the system, and prove that renormalized solutions coincide with weak solutions under additional integrability assumptions. |
| title | Global existence of Lagrangian solutions to the ionic Vlasov--Poisson system |
| topic | Analysis of PDEs |
| url | https://arxiv.org/abs/2501.13872 |