- class qiskit.opflow.gradients.CircuitQFI#
Deprecated: Circuit to Quantum Fisher Information operator converter.
Converter for changing parameterized circuits into operators whose evaluation yields Quantum Fisher Information metric tensor with respect to the given circuit parameters
This is distinct from DerivativeBase converters which take gradients of composite operators and handle things like differentiating combo_fn’s and enforcing product rules when operator coefficients are parameterized.
CircuitQFI - uses quantum techniques to get the QFI of circuits DerivativeBase - uses classical techniques to differentiate opflow data structures
Deprecated since version 0.24.0: The class
qiskit.opflow.gradients.circuit_qfis.circuit_qfi.CircuitQFIis 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.
- abstract convert(operator, params)#
An operator whose evaluation yields the QFI metric tensor.
ValueError – If
paramscontains a parameter not present in
- Return type: