The Landau equation as a Gradient Flow
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2020
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| _version_ | 1866917671151337472 |
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| author | Carrillo, José A. Delgadino, Matias G. Desvillettes, Laurent Wu, Jeremy S. H. |
| author_facet | Carrillo, José A. Delgadino, Matias G. Desvillettes, Laurent Wu, Jeremy S. H. |
| contents | We propose a gradient flow perspective to the spatially homogeneous Landau equation for soft potentials. We construct a tailored metric on the space of probability measures based on the entropy dissipation of the Landau equation. Under this metric, the Landau equation can be characterized as the gradient flow of the Boltzmann entropy. In particular, we characterize the dynamics of the PDE through a functional inequality which is usually referred as the Energy Dissipation Inequality. Furthermore, analogous to the optimal transportation setting, we show that this interpretation can be used in a minimizing movement scheme to construct solutions to a regularized Landau equation. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2007_08591 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | The Landau equation as a Gradient Flow Carrillo, José A. Delgadino, Matias G. Desvillettes, Laurent Wu, Jeremy S. H. Analysis of PDEs Mathematical Physics 35Q70 (Primary), 35Q84 (Secondary), 35Q20, 35D30 We propose a gradient flow perspective to the spatially homogeneous Landau equation for soft potentials. We construct a tailored metric on the space of probability measures based on the entropy dissipation of the Landau equation. Under this metric, the Landau equation can be characterized as the gradient flow of the Boltzmann entropy. In particular, we characterize the dynamics of the PDE through a functional inequality which is usually referred as the Energy Dissipation Inequality. Furthermore, analogous to the optimal transportation setting, we show that this interpretation can be used in a minimizing movement scheme to construct solutions to a regularized Landau equation. |
| title | The Landau equation as a Gradient Flow |
| topic | Analysis of PDEs Mathematical Physics 35Q70 (Primary), 35Q84 (Secondary), 35Q20, 35D30 |
| url | https://arxiv.org/abs/2007.08591 |