OperatorBase

class OperatorBase

Bases : StarAlgebraMixin, TensorMixin, ABC

A base class for all Operators: PrimitiveOps, StateFns, ListOps, etc. Operators are defined as functions which take one complex binary function to another. These complex binary functions are represented by StateFns, which are themselves a special class of Operators taking only the Zero StateFn to the complex binary function they represent.

Operators can be used to construct complicated functions and computation, and serve as the building blocks for algorithms.

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.
bind_parameters	Same as assign_parameters, but maintained for consistency with QuantumCircuit in Terra (which has both assign_parameters and bind_parameters).
compose	Return Operator Composition between self and other (linear algebra-style: A@B(x) = A(B(x))), overloaded by @.
copy	Return a deep copy of the Operator.
equals	Evaluate Equality between Operators, overloaded by ==.
eval	Evaluate the Operator's underlying function, either on a binary string or another Operator.
is_hermitian	Return True if the operator is hermitian.
mul	Returns the scalar multiplication of the Operator, overloaded by *, including support for Terra's Parameters, which can be bound to values later (via bind_parameters).
neg	Return the Operator's negation, effectively just multiplying by -1.0, overloaded by -.
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 ^.
tensorpower	Return tensor product with self multiple times, overloaded by ^.
to_circuit_op	Returns a CircuitOp equivalent to this Operator.
to_matrix	Return NumPy representation of the Operator.
to_matrix_op	Returns a MatrixOp equivalent to this Operator.
to_spmatrix	Return SciPy sparse matrix representation of the Operator.

Attributes

INDENTATION = '  '

instance_id

Return the unique instance id.

Type renvoyé

int

num_qubits

The number of qubits over which the Operator is defined. If op.num_qubits == 5, then op.eval('1' * 5) will be valid, but op.eval('11') will not.

Type renvoyé

int

Renvoie

The number of qubits accepted by the Operator’s underlying function.

parameters

Return a set of Parameter objects contained in the Operator.

settings

Return settings of this object in a dictionary.

You can, for example, use this settings dictionary to serialize the object in JSON format, if the JSON encoder you use supports all types in the dictionary.

Type renvoyé

Dict

Renvoie

Object settings in a dictionary.