2LPTIC: 2nd-order Lagrangian Perturbation Theory Initial Con

Discussion topics for individual codes
Post Reply
User avatar
Guardian of the Codes
Posts: 1122
Joined: Wed Aug 04, 2004 4:18 pm
Location: Washington, DC

2LPTIC: 2nd-order Lagrangian Perturbation Theory Initial Conditions

Post by owlice » Tue Jan 03, 2012 5:27 am

[c]2LPTIC: 2nd-order Lagrangian Perturbation Theory Initial Conditions[/c][/b]
Abstract: Setting initial conditions in numerical simulations using the standard procedure based on the Zel'dovich approximation (ZA) generates incorrect second and higher-order growth and therefore excites long-lived transients in the evolution of the statistical properties of density and velocity fields. Using more accurate initial conditions based on second-order Lagrangian perturbation theory (2LPT) reduces transients significantly; initial conditions based on 2LPT are thus much more appropriate for numerical simulations devoted to precision cosmology. The 2LPTIC code provides initial conditions for running cosmological simulations based on second-order Lagrangian Perturbation Theory (2LPT), rather than first-order (Zel'dovich approximation).

Credit: Crocce, M.; Pueblas, S.; Scoccimarro, R.

Site: https://cosmo.nyu.edu/roman/2LPT/

Bibcode: 2012ascl.soft01005C

ID: ascl:1201.005
Last edited by Ada Coda on Sun Feb 10, 2019 8:37 pm, edited 1 time in total.
Reason: Updated code entry.
Code-seeking owl at your service

Post Reply