paraqeet.propagation.scipy_expm.ScipyExpm

class paraqeet.propagation.scipy_expm.ScipyExpm(model, resolution)

Bases: Propagation

Piecewise matrix exponential propagation system.

Solve the equation of motion by piecewise exponentiation with the Scipy package.

Parameters:

• model (Model) – Represents the equation of motion for a given Hamiltonian.

• res (float) – Resolution at which to sample the EOM.

• resolution (float)

__init__(model, resolution)

Parameters:

• model (EquationOfMotion)

• resolution (float)

Methods

__init__(model, resolution)
get_parameters()	Per default, propagation methods have no parameters to optimize.
propagate(time)	Return the solution of the equations of motion.
set_initial_state(state)	Set initial state.

Attributes

is_open	Return if the propagation is for open or closed system.
resolution	Return the propagation resolution.

get_parameters()

Per default, propagation methods have no parameters to optimize.

property is_open: bool

Return if the propagation is for open or closed system.

propagate(time)

Return the solution of the equations of motion.

Loop over all desired times in time at set resolution.

Parameters:

time (Array) – Any one-dimensional vector of timestamps.

Returns:

Returns the solution of the equations of motion.

Return type:

Array

Raises:

ConfigurationException – If the initial state is not set.

property resolution: float

Return the propagation resolution.

set_initial_state(state)

Set initial state.