# Drift¶

class Drift(*, operator, noise=None)

Either a static or a noisy Hamiltonian term for the colored noise simulation calculation. If the term doesn’t have a noise associated with it, it takes the form of a constant Hermitian operator $$D_{l}$$. If it has a noise associated with it, it takes the form $$\beta_{D_{l}}(t) D_{l}$$, where $$\beta_{D_{l}}(t)$$ is the noise amplitude.

Variables
• operator (ndarray) – The Hermitian matrix $$D_{l}$$ that represents the term.

• noise (qctrl.dynamic.types.colored_noise_simulation.Noise, optional) – The noise amplitude $$\beta_{D_{l}}(t)$$ associated to the term. If not provided, the term is assumed to be static, or $$\beta_{D_{l}}(t) = 1$$.