Modelling of warm dense hydrogen via explicit real time electron dynamics: Electron transport properties
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912069124620288 |
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| author | Svensson, Pontus Hollebon, Patrick Plummer, Daniel Vinko, Sam M. Gregori, Gianluca |
| author_facet | Svensson, Pontus Hollebon, Patrick Plummer, Daniel Vinko, Sam M. Gregori, Gianluca |
| contents | We extract electron transport properties from atomistic simulations of a two-component plasma, by mapping the long-wavelength behaviour to a two-fluid model. The mapping procedure is performed via Markov Chain Monte Carlo sampling over multiple spectra simultaneously. The free-electron dynamic structure factor and its properties have been investigated in the hydrodynamic formulation to justify its application to the long-wavelength behaviour of warm dense matter. We have applied this method to warm dense hydrogen modelled with wave packet molecular dynamics, and showed that the inferred electron transport properties are in agreement with a variety of reference calculations, except for the electron viscosity, where a substantive decrease is observed when compared to classical models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08664 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Modelling of warm dense hydrogen via explicit real time electron dynamics: Electron transport properties Svensson, Pontus Hollebon, Patrick Plummer, Daniel Vinko, Sam M. Gregori, Gianluca Plasma Physics We extract electron transport properties from atomistic simulations of a two-component plasma, by mapping the long-wavelength behaviour to a two-fluid model. The mapping procedure is performed via Markov Chain Monte Carlo sampling over multiple spectra simultaneously. The free-electron dynamic structure factor and its properties have been investigated in the hydrodynamic formulation to justify its application to the long-wavelength behaviour of warm dense matter. We have applied this method to warm dense hydrogen modelled with wave packet molecular dynamics, and showed that the inferred electron transport properties are in agreement with a variety of reference calculations, except for the electron viscosity, where a substantive decrease is observed when compared to classical models. |
| title | Modelling of warm dense hydrogen via explicit real time electron dynamics: Electron transport properties |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2410.08664 |