OperatorStateFn

class OperatorStateFn(*args, **kwargs)

Bases: StateFn

Deprecated: A class for state functions and measurements which are defined by a density Operator, stored using an OperatorBase.

Obsoleto desde a versão 0.24.0: The class qiskit.opflow.state_fns.operator_state_fn.OperatorStateFn is 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.

Parâmetros

• primitive – The OperatorBase which defines the behavior of the underlying State function.

• coeff – A coefficient by which to multiply the state function

• is_measurement – Whether the StateFn is a measurement 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 ~.
eval	Evaluate the Operator's underlying function, either on a binary string or another Operator.
permute	Permute the qubits of the state function.
primitive_strings	Return a set of strings describing the primitives contained in the Operator.
sample	Sample the state function as a normalized probability distribution.
tensor	Return tensor product between self and other, overloaded by ^.
to_circuit_op	Return StateFnCircuit corresponding to this StateFn.
to_density_matrix	Return numpy matrix of density operator, warn if more than 16 qubits to force the user to set massive=True if they want such a large matrix.
to_matrix	Note: this does not return a density matrix, it returns a classical matrix containing the quantum or classical vector representing the evaluation of the state function on each binary basis state.
to_matrix_op	Return a MatrixOp for this operator.

Attributes

INDENTATION = '  '

coeff

A coefficient by which the state function is multiplied.

instance_id

Return the unique instance id.

is_measurement

Whether the StateFn object is a measurement Operator.

num_qubits

parameters

primitive: OperatorBase

The primitive which defines the behavior of the underlying State function.

settings

Return settings.