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DTSTAMP:20210916T132530Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210708T110000
DTEND;TZID=Europe/Stockholm:20210708T130000
UID:submissions.pasc-conference.org_PASC21_sess158@linklings.com
SUMMARY:Cosmological N-Body Simulations Beyond Newtonian Physics
DESCRIPTION:Minisymposium\n\nCosmology has undergone a revolution, from a 
 rather philosophical enterprise to a data-driven, observational science. T
 o make sense of the terabytes and petabytes of data streaming in from the 
 new and future facilities we need large-scale N-body simulations that cont
 ain the relevant physics and cover a huge dynamical range to reach the req
 uired precision, in the future they will provide a benchmark problem for e
 xascale computing. These simulations combine many numerical challenges, in
 cluding load-balancing multi-scale dynamical evolution, solving nonlinear 
 finite-difference equations, managing complex data sets and performing on-
 the-fly statistical analyses. This minisymposium reviews the methods behin
 d the largest current simulations that evolve over a trillion particles, a
 nd ongoing developments in including effects from General Relativity as we
 ll as relativistic fields and particles in the simulations. The presentati
 ons will provide both an overview of current results relevant for cosmolog
 y and a look inside the machinery (algorithms and their implementations) b
 ehind the latest generation of cosmological simulation codes.\n\nk-evoluti
 on: A Relativistic N-Body Code for Clustering Dark Energy\n\nHassani\n\nI'
 m going to introduce k-evolution, a relativistic N-body code based on gevo
 lution, which includes clustering dark energy among its cosmological compo
 nents. I'll show the effect of dark energy non-linearities on the power sp
 ectrum of dark matter, dark energy and the gravitational potential using k
 -e...\n\n---------------------\nIncorporating General Relativity and Radia
 tion into N-Body Simulations\n\nHannestad\n\nBy far the majority of all co
 smological N-body simulations are Newtonian in nature. However, it is poss
 ible to make such simulations consistent with general relativity by adding
  a few ingredients: The equation of motion of particles must receive relat
 ivistic corrections, and any relativistic energy ...\n\n------------------
 ---\nNumerical Methods for Clustering Dark Energy Simulations\n\nBlot, Cor
 asaniti\n\nClustering dark energy is a class of models in which the speed 
 of propagation of the perturbations in the dark energy component is small 
 compared to the speed of light, causing the perturbations to collapse on s
 cales inside the horizon and affecting the process of cosmic structure for
 mation. In this...\n\n---------------------\nOverview of General Relativis
 tic N-Body Simulation\n\nDaverio\n\nIn the past 5 years, efforts have been
  made to develop b-Body code where gravity is treated using General Relati
 vity using different approaches of numerical relativity, using the weak fi
 eld expansion, the fully constraint formulation, the BSSN and CCZ4 formula
 tion and finally the harmonic formulatio...\n\n\nDomain: Physics
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