# DerivativeBase¶

class DerivativeBase[소스]

기반 클래스: qiskit.aqua.operators.converters.converter_base.ConverterBase

Base class for differentiating opflow objects.

Converter for differentiating opflow objects and handling things like properly differentiating combo_fn’s and enforcing product rules when operator coefficients are parameterized.

This is distinct from CircuitGradient converters which use quantum techniques such as parameter shifts and linear combination of unitaries to compute derivatives of circuits.

CircuitGradient - uses quantum techniques to get derivatives of circuits DerivativeBase - uses classical techniques to differentiate opflow data structures

Methods

 convert type operator OperatorBase gradient_wrapper Get a callable function which provides the respective gradient, Hessian or QFI for given parameter values. parameter_expression_grad Get the derivative of a parameter expression w.r.t.