EvolvedOp

class EvolvedOp(primitive, coeff=1.0)

Bases: qiskit.opflow.primitive_ops.primitive_op.PrimitiveOp

Class for wrapping Operator Evolutions for compilation (convert) by an EvolutionBase method later, essentially acting as a placeholder. Note that EvolvedOp is a weird case of PrimitiveOp. It happens to be that it fits into the PrimitiveOp interface nearly perfectly, and it essentially represents a placeholder for a PrimitiveOp later, even though it doesn’t actually hold a primitive object. We could have chosen for it to be an OperatorBase, but would have ended up copying and pasting a lot of code from PrimitiveOp.

Parameters

• primitive (OperatorBase) – The operator being wrapped to signify evolution later.

• coeff (Union[complex, ParameterExpression]) – A coefficient multiplying the operator

Methods Defined Here

add	Return Operator addition of self and other, overloaded by +.
adjoint	Return a new Operator equal to the Operator’s adjoint (conjugate transpose), overloaded by ~.
assign_parameters	Binds scalar values to any Terra Parameters in the coefficients or primitives of the Operator, or substitutes one Parameter for another.
compose	Return Operator Composition between self and other (linear algebra-style: A@B(x) = A(B(x))), overloaded by @.
equals	Evaluate Equality between Operators, overloaded by ==.
eval	Evaluate the Operator’s underlying function, either on a binary string or another Operator.
log_i	Return a MatrixOp equivalent to log(H)/-i for this operator H.
permute	Permutes the qubits of the operator.
primitive_strings	Return a set of strings describing the primitives contained in the 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_instruction	Returns an Instruction equivalent to this Operator.
to_matrix	Return NumPy representation of the Operator.
to_matrix_op	Returns a MatrixOp equivalent to this Operator.

Attributes

INDENTATION = ' '

coeff

The scalar coefficient multiplying the Operator.

Return type

Union[complex, ParameterExpression]

Returns

The coefficient.

instance_id

Return the unique instance id.

Return type

int

num_qubits

Return type

int

parameters

primitive: qiskit.opflow.primitive_ops.primitive_op.PrimitiveOp

The primitive defining the underlying function of the Operator.

Return type

Union[QuantumCircuit, Operator, Pauli, SparsePauliOp, OperatorBase]

Returns

The primitive object.

settings

Return operator settings.

Return type

Dict