Function qcd_sme::common::thermal::fermi_distribution_double_zero_temp

pub fn fermi_distribution_double_zero_temp<T1: Num + Sub<T2, Output = T1>, T2: Num>(
    en: T1,
    mu: T2
) -> T1

The Fermi-Dirac distribution, summed over positive and negative chemical potential, at zero temperature.

As a function of the energy en and chemical potential mu. Equal to fermi_distribution_zero_temp(en, mu) + fermi_distribution_zero_temp(en, -mu).