How to use STOLAS

Download

Download from the GitHub page STOLAS to the local folder.

Set the parameters

You may change parameteres of STOLAS by changing parameters.hpp.

• sigma: ksigma = 2pi sigma exp(N) / L, nsigma = sigma exp(N)
• dn: Thickness of nsigma sphere shell
• NL: Box size L
• dN: e-folds step
• Nprec: Precision of e-foldings
• dlogn: Width of bin in power spectrum

You can choose output of the result.

• szeta: Output the curvature perturbation
• spower: Output the power spectrum
• scompaction: Output the compaction function
• sanimation: Output the animation

Make map of noise and bias

• Go to source directry cd source

• Make directlies 'noisedata' nad 'biasdata' in source directly mkdir noisedata biasdata

• Compile make

• Make a biasmap ./biasmap

• Make a nisemap with file number (now we choose number '0') ./noisemap 0

The first Run: chaotic inflation

• Go to model directry cd ../chaotic

• Compile make

• Make a map of curvature perturbation with noisemap filenumber ./chaotic 0

Impotance sampling

In parameters.hpp, you can change the detail of the bias.

• Nbias: Time of the bias
• dNbias: Variance of the bias
• bias: Amplitude of the bias