Adds "FieldFinal" option to InflationEvolution and related functions. This allows one to stop inflation reliably if the position of the minimum of the potential is known a priori.
Tests
First, evaluate a natural inflation model with default options: InflationEvolution[1/2 a'[t]^2 - (1 - Cos[a[t]/5]), {a[t], 15., 0}, t], observe the inflation-end time is 209.
Plot the field evolution, Plot[%["Field"][t], {t, 0, 209}], observe that the field goes all the way to zero.
Now, evaluate the same model with "FieldFinal" set to 10: InflationEvolution[1/2 a'[t]^2 - (1 - Cos[a[t]/5]), {a[t], 15., 0}, t, "FieldFinal" -> 10], note inflation ends at t = 133 this time.
Plot the evolution: Plot[%["Field"][t], {t, 0, 133}], note the field stops at 10.
Changes
"FieldFinal"option toInflationEvolutionand related functions. This allows one to stop inflation reliably if the position of the minimum of the potential is known a priori.Tests
InflationEvolution[1/2 a'[t]^2 - (1 - Cos[a[t]/5]), {a[t], 15., 0}, t], observe the inflation-end time is 209.Plot[%["Field"][t], {t, 0, 209}], observe that the field goes all the way to zero.InflationEvolution[1/2 a'[t]^2 - (1 - Cos[a[t]/5]), {a[t], 15., 0}, t, "FieldFinal" -> 10], note inflation ends at t = 133 this time.Plot[%["Field"][t], {t, 0, 133}], note the field stops at 10.