paramagpy.metal.Metal.spec_dens

static Metal.spec_dens(tau, omega)

A spectral density function with Lorentzian shape:

\[\mathbb{J}(\tau,\omega)=\frac{\tau}{1+(\omega\tau)^2}\]

Parameters

• tau (float) – correaltion time

• omega (float) – frequency

Returns

value – the value of the spectral denstiy

Return type

float