qimpy.transport.material.ab_initio.EMField

class EMField(*, ab_initio, grad_phi=(0.0, 0.0, 0.0), checkpoint_in=(None, ''))

Bases: TreeNode

Magnetic field pulse to rotate spins by specific angles.

Parameters:

• ab_initio (AbInitio)

• grad_phi (dict[int, Tensor])

• checkpoint_in (CheckpointPath)

__init__(*, ab_initio, grad_phi=(0.0, 0.0, 0.0), checkpoint_in=(None, ''))

Initialize EM field interaction.

Parameters:

• grad_phi (Tensor | ndarray | float | Sequence[float]) – [Input file] Scalar potential.

• ab_initio (AbInitio)

• checkpoint_in (CheckpointPath)

Return type:

None

Methods

__init__	Initialize EM field interaction.
add_child	Construct child object self.`attr_name` of type cls.
add_child_one_of	Invoke add_child on one of several child options in args.
initialize_fields
rho_dot
save_checkpoint	Save self and all children in hierarchy to cp_path.

Attributes

ab_initio
constant_params	constant values of parameters
grad_phi	Electric field strength
child_names	Names of attributes with child objects.
variant_name	Version of children having variants (if any)

constant_params: dict[str, Tensor]

constant values of parameters

grad_phi: dict[int, Tensor]

Electric field strength