GradientBase¶

class GradientBase(grad_method='param_shift', **kwargs)[código fonte]¶

Bases: DerivativeBase

Deprecated: Base class for first-order operator gradient.

Convert an operator expression to the first-order gradient.

Obsoleto desde a versão 0.24.0: The class qiskit.opflow.gradients.gradient_base.GradientBase is deprecated as of qiskit-terra 0.24.0. It will be removed no earlier than 3 months after the release date. For code migration guidelines, visit https://qisk.it/opflow_migration.

Parâmetros

grad_method (Union[str, CircuitGradient]) – The method used to compute the state/probability gradient. Can be either 'param_shift' or 'lin_comb' or 'fin_diff'. Ignored for gradients w.r.t observable parameters.
kwargs (dict) – Optional parameters for a CircuitGradient

Levanta

ValueError – If method != fin_diff and epsilon is not None.

Attributes

grad_method¶

Returns CircuitGradient.

Retorno: CircuitGradient.