HessianBase¶

class HessianBase(hess_method='param_shift', **kwargs)[source]¶

Bases : DerivativeBase

Deprecated: Base class for the Hessian of an expected value.

Obsolète depuis la version 0.24.0: The class qiskit.opflow.gradients.hessian_base.HessianBase 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.

Paramètres

hess_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

Lève

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

Attributes

hess_method¶

Returns CircuitGradient.

Renvoie: CircuitGradient.