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maxitg / InflationSimulator

Code for simulating inflation, including Lagrangians with non-canonical kinetic energy.
MIT License
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Reimplement computation of non-Gaussianity #24

Open maxitg opened 5 years ago

maxitg commented 5 years ago

Non-Gaussianity amplitude is no longer computed in v0.3 (i.e., in multi-field version). It needs to be reimplemented.

This would require optimizations for InflationValue as right now using expressions large enough as is required for non-Gaussianity would be very slow (because intermediate expressions are recomputed many times and not cached).

Also, non-Gaussianity amplitude should be renamed to be more specific as to which non-Gaussianity it is.

maxitg commented 5 years ago

Main issue here is that we need equations for speed of sound and non-Guassianity for a multiple-field general Lagrangian. Otherwise, s-correction to scalar spectral index cannot be computed.