Spanish Relativity Meeting: almost 100 years after Einstein's revolution | |
General relativistic neutrino transport with spectral methods | |
Peres, Bruno^1 | |
Departament d'Astronomia i Astrofísica, Universitat de Valencia, Edifici d'Investigació Jeroni Munyoz, C/ Dr. Moliner, 50, Burjassot (Valencia) | |
46100, Spain^1 | |
关键词: Computational power; Computational resources; Energy dependence; General Relativity; High demand; Neutrino transport; Spectral methods; Technical aspects; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/600/1/012010/pdf DOI : 10.1088/1742-6596/600/1/012010 |
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来源: IOP | |
【 摘 要 】
Supernovae numerical simulations are highly demanding in computational power, yet they are also rapidly increasing in complexity. There is now a very high demand in new methods for neutrino treatment, due to the fact that neutrino is at the same time a crucial ingredient and the most expensive one in computational resources. A possibility to explore is the treatment by spectral methods, because they are known to require less resources. It is the purpose of a new code, named Lorene's Ghost (for Lorene's gravitational handling of spectral transport), developed to treat the problem of neutrino transport in supernovae. The code can handle full phase-space dependent problems (6D + time), retains the full energy dependence of the neutrinos, and can also handle general relativity in the conformally flat approximation. Several points of the formalism needed to obtain a formulation of the general relativistic Boltzmann equation adapted to our case are discussed, as well as some technical aspects of spectral methods.
【 预 览 】
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