Simon Fraser University
DEFROST: A Code for Simulating the Big Bang

Simulating the Big Bang

DEFROST is a numerical code for simulating preheating of the Universe after the end of the inflation. It is small, easy to modify, very fast, and fully instrumented for 3D visualizations. DEFROST was written by Andrei Frolov for his early Universe research. The source code is published and distributed under the terms of GNU Public License.

If you use DEFROST in your research, please cite arXiv:0809.4904 (the preprint describing DEFROST internals and presenting simulations of chaotic preheating).
Cosmic Bubbles


Cool Movie of the Month

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3D volume render: Density ρ
High quality 960x720 movie in H.264/MPEG-4 AVC (8Mb)

Preheating Models

More Preheating Codes

Modified by Andrei Frolov <> on 2023-05-19