FourierPropagator

About the FourierPropagator class

The WaveBlocks Project

@author: R. Bourquin @copyright: Copyright (C) 2010, 2011, 2012 R. Bourquin @license: Modified BSD License

Inheritance diagram

Class documentation

class WaveBlocks.FourierPropagator(potential, initial_values, para)

This class can numerically propagate given initial values in a potential surface . The propagation is done with a Strang splitting of the time propagation operator.

Psi = None

The initial values of the components sampled at the given nodes.

T = None

The kinetic operator defined in momentum space.

TE = None

Exponential of used in the Strang splitting.

V = None

The potential operator defined in position space.

VE = None

Exponential of used in the Strang splitting.

get_number_components()

Returns:The number of components of .

get_operators()

Returns:Return the numerical expressions of the propagation operators and .

get_potential()

Returns:The MatrixPotential instance used for time propagation.

get_wavefunction()

Returns:The WaveFunction instance that stores the current wavefunction data.

kinetic_energy(summed=False)

This method just delegates the calculation of kinetic energies to the embedded WaveFunction object.

Parameters:summed – Whether to sum up the kinetic energies of the individual components. Returns:The kinetic energies.

nodes = None

The position space nodes .

omega = None

The momentum space nodes .

potential = None

The embedded MatrixPotential instance representing the potential .

potential_energy(summed=False)

This method just delegates the calculation of potential energies to the embedded WaveFunction object.

Parameters:summed – Whether to sum up the potential energies of the individual components. Returns:The potential energies.

propagate()

Given the wavefunction values at time , calculate new values at time . We perform exactly one timestep here.