qspec.source_energy_pdf  (  f ,  f0 ,  sigma ,  xi ,  collinear = True  )[source]

This is the same function as normal_chi2_convolved_f_xi_pdf with less array processing and reordered parameters, used in qspec.models.

Parameters:

farray_like

The frequency quantiles $f$ (arb. units).

f0scalar

A frequency offset $f_0$ ([f]).

sigmascalar

The standard deviation of the underlying normal distribution in frequency units ([f]).

xiscalar

The asymmetry parameter $\xi$ ([f]).

collinearbool

The laser can be aligned collinearly (True) or anticollinearly (False) to the velocity of the atom.

Returns:

rho_fndarray

The probability density in thermal equilibrium at the frequency f (1/[f]).