Skip to main contentIBM Quantum Documentation
This page is from an old version of Qiskit SDK and does not exist in the latest version. We recommend you migrate to the latest version. See the release notes for more information.

qiskit.opflow.primitive_ops


Primitive Operators

qiskit.opflow.primitive_ops

Deprecated since version 0.24.0

The qiskit.opflow module is deprecated and will be removed no earlier than 3 months after the release date. For code migration guidelines, visit https://qisk.it/opflow_migration.

Operators are defined to be functions which take State functions to State functions.

PrimitiveOps are the classes for representing basic Operators, backed by computational Operator primitives from Terra. These classes (and inheritors) primarily serve to allow the underlying primitives to “flow” - i.e. interoperability and adherence to the Operator formalism - while the core computational logic mostly remains in the underlying primitives. For example, we would not produce an interface in Terra in which QuantumCircuit1 + QuantumCircuit2 equaled the Operator sum of the circuit unitaries, rather than simply appending the circuits. However, within the Operator flow summing the unitaries is the expected behavior.

Note

All mathematical methods are not in-place, meaning that they return a new object, but the underlying primitives are not copied.

Primitive Operators

PrimitiveOp(primitive[, coeff])Deprecated: A class for representing basic Operators, backed by Operator primitives from Terra.
CircuitOp(*args, **kwargs)Deprecated: Class for Operators backed by Terra's QuantumCircuit module.
MatrixOp(*args, **kwargs)Deprecated: Class for Operators represented by matrices, backed by Terra's Operator module.
PauliOp(*args, **kwargs)Deprecated: Class for Operators backed by Terra's Pauli module.
PauliSumOp(*args, **kwargs)Deprecated: Class for Operators backed by Terra's SparsePauliOp class.
TaperedPauliSumOp(*args, **kwargs)Deprecated: Class for PauliSumOp after tapering

Symmetries

Z2Symmetries(symmetries, sq_paulis, sq_list)Deprecated: Z2 Symmetries
Was this page helpful?
Report a bug or request content on GitHub.