TensoredOp¶

class TensoredOp(oplist, coeff=1.0, abelian=False)[source]¶

Bases: qiskit.opflow.list_ops.list_op.ListOp

A class for lazily representing tensor products of Operators. Often Operators cannot be efficiently tensored to one another, but may be manipulated further so that they can be later. This class holds logic to indicate that the Operators in oplist are meant to be tensored together, and therefore if they reach a point in which they can be, such as after conversion to QuantumCircuits, they can be reduced by tensor product.

Parameters

oplist (List[OperatorBase]) – The Operators being tensored.
coeff (Union[complex, ParameterExpression]) – A coefficient multiplying the operator
abelian (bool) – Indicates whether the Operators in oplist are known to mutually commute.

Methods Defined Here

`eval`	Evaluate the Operator's underlying function, either on a binary string or another Operator.
`reduce`	Try collapsing the Operator structure, usually after some type of conversion, e.g.
`tensor`	Return tensor product between self and other, overloaded by `^`.
`to_circuit`	Returns the quantum circuit, representing the tensored operator.
`to_matrix`	Return NumPy representation of the Operator.

Attributes

INDENTATION = ' '¶

abelian¶

Whether the Operators in oplist are known to commute with one another.

Return type: bool
Returns: A bool indicating whether the oplist is Abelian.

coeff¶

The scalar coefficient multiplying the Operator.

Return type: Union[complex, ParameterExpression]
Returns: The coefficient.

coeffs¶

Return a list of the coefficients of the operators listed. Raises exception for nested Listops.

Return type: List[Union[complex, ParameterExpression]]

combo_fn¶

The function defining how to combine oplist (or Numbers, or NumPy arrays) to produce the Operator’s underlying function. For example, SummedOp’s combination function is to add all of the Operators in oplist.

Return type: Callable
Returns: The combination function.

distributive¶

Return type: bool

grad_combo_fn¶

The gradient of combo_fn.

Return type: Optional[Callable]

instance_id¶

Return the unique instance id.

Return type: int

num_qubits¶

Return type: int

oplist¶

The list of OperatorBases defining the underlying function of this Operator.

Return type: List[OperatorBase]
Returns: The Operators defining the ListOp

parameters¶

settings¶

Return settings.

Return type: Dict