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GradientBase

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

Bases: DerivativeBase

Base class for first-order operator gradient.

Convert an operator expression to the first-order gradient.

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.

Tipo de retorno

CircuitGradient

Retorno

CircuitGradient.