HessianBase#

class qiskit.opflow.gradients.HessianBase(hess_method='param_shift', **kwargs)[fuente]#

Bases: DerivativeBase

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

Obsoleto desde la versión 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.

Parámetros:

  • hess_method (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

Muestra:

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

Attributes

hess_method#

Returns CircuitGradient.

Devuelve:

CircuitGradient.