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@INPROCEEDINGS{Gibbon:1048672,
      author       = {Gibbon, Paul},
      title        = {{PEPC}: {A}n {O}pen-{S}ource {M}ulti-{P}hysics {F}ramework
                      for {M}esh-free {S}imulation of {N}-{B}ody {S}ystems},
      reportid     = {FZJ-2025-04795},
      year         = {2025},
      note         = {Minisymposium on Advances in Particle MethodsOrganizers:
                      Andrew J. Christlieb, Jingwei Hu, Lee
                      RicketsonDescription:Particle methods have been an essential
                      tool in the simulation of problems that are dominated by
                      kinetic effects. Typically these methods are at best second
                      order and have dominated engineering and physics due to
                      their ease of implementation and direct interpretability.
                      Over the past 10 years, advances in particle methods have
                      created a renaissance and how we approach solving these
                      problems, offering more flexibility, greater accuracy and
                      rigorous structure preservation. This minisymposium is
                      designed to highlight advances in particle methods. Topics
                      include fully implicit methods, mesh free representations,
                      structure preserving algorithms, asymptotic preserving
                      methods, adjoint methods for particle representations. This
                      survey of recent advances is meant to engage the
                      mathematical community in a discussion about value of these
                      methods and the importance of this renaissance in method
                      development.},
      abstract     = {PEPC is a multi-physics community tree-code developedand
                      hosted by JSC over the last two decades [P. Gibbonet al.
                      (2024), DOI: 10.5281/zenodo.11035167.]. At itscore the code
                      utilises a hierarchical tree structure originallybased on
                      the Salmon-Warren Hashed Oct Tree scheme toperform rapid
                      force summation of a dynamical N-body sys-tem interacting
                      via long-range potentials on heterogeneoussuperomputer
                      architectures. Depending on the physicalchoice of potential,
                      the algorithm can be applied to di-verse fields such as
                      plasma, gravitational systems and vor-tex fluids [Durante et
                      al., Math. Comp. in Simulation225, 528 (2024)]. In this talk
                      we highlight some of the re-cent key developments in the
                      PEPC framework, coveringalgorithmic and physical aspects and
                      such as GPU port-ing, time-integration schemes, management
                      of dynamicalparticle populations [Chew et al., Plasma Phys.
                      Contr.Fusion 63, 045012 (2024)] and inclusion of
                      self-generatedmagnetic fields [Siddi et al., Phys. Plasmas
                      24, 082103(2017)] in charged-particle systems.},
      month         = {Mar},
      date          = {2025-03-03},
      organization  = {SIAM Conference on Computational
                       Science and Engineering, Fort Worth, TX
                       (USA), 3 Mar 2025 - 7 Mar 2025},
      subtyp        = {Invited},
      cin          = {JSC},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / Simulation and Data
                      Lab Plasma Physics},
      pid          = {G:(DE-HGF)POF4-5111 / G:(DE-Juel-1)SDLPP},
      typ          = {PUB:(DE-HGF)6},
      doi          = {10.34734/FZJ-2025-04795},
      url          = {https://juser.fz-juelich.de/record/1048672},
}