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SUMMARY:Relativistic multi-dimensional Boltzmann transport for neutrinos i
 n astrophysical systems
DTSTART:20260430T120000Z
DTEND:20260430T140000Z
DTSTAMP:20260424T233700Z
UID:indico-event-499@indico.tpi.uni-jena.de
DESCRIPTION:Speakers: Arthur Offermans\n\nModelling neutrinos in astrophys
 ical systems requires to solve the 7D relativistic Boltzmann equation. Bec
 ause of its high dimensionality\, solving this equation is intrinsically e
 xtremely computationally expensive. To mitigate this problem\, more afford
 able approximations to the Boltzmann equation are often used instead. Howe
 ver\, it is difficult to gauge the effect of such approximations on the ev
 olution of the system\, unless we have access to the true solution. Theref
 ore\, we implemented a relativistic multi-dimensional Boltzmann solver in 
 the GRMHD code Gmunu to compute these full solutions. In this talk\, I wil
 l present our solver and discuss the main challenges of solving this 7D eq
 uation\, both in terms of computational cost and accuracy. Then\, I will d
 iscuss the performance of the solver on various test cases. Finally\, I wi
 ll present some preliminary results on its application to neutrino flavor 
 instability.\n \n\nhttps://indico.tpi.uni-jena.de/event/499/
URL:https://indico.tpi.uni-jena.de/event/499/
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