Full numerical N-body treatment is required for reliable gravitational wave predictions from nonspherical collapse in early matter-dominated eras, with resulting spectra mappable to detector sensitivities via horizon mass and reheating temperature.
Rampf, Cosmological Vlasov–Poisson equations for dark matter: Recent developments and connections to selected plasma problems, Rev
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A phase-space perturbation theory solves the Vlasov-Poisson system without truncating momentum cumulants, recovers standard results for cold initial conditions, and generates higher cumulants dynamically from slight initial velocity dispersion.
The authors introduce post-collapse Lagrangian perturbation theory (PCPT) that asymptotically captures early post-shell-crossing dynamics in 3D by using high-order LPT until crossing and then 1D pancake results for gravitational backreaction.
citing papers explorer
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Gravitational wave emission from nonspherical collapse in an early matter-dominated era using N-body simulations
Full numerical N-body treatment is required for reliable gravitational wave predictions from nonspherical collapse in early matter-dominated eras, with resulting spectra mappable to detector sensitivities via horizon mass and reheating temperature.
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Phase-space perturbation theory for cosmic large-scale structure
A phase-space perturbation theory solves the Vlasov-Poisson system without truncating momentum cumulants, recovers standard results for cold initial conditions, and generates higher cumulants dynamically from slight initial velocity dispersion.
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Post-collapse Lagrangian perturbation theory in three dimensions
The authors introduce post-collapse Lagrangian perturbation theory (PCPT) that asymptotically captures early post-shell-crossing dynamics in 3D by using high-order LPT until crossing and then 1D pancake results for gravitational backreaction.