ScalarOp

class ScalarOp(dims=None, coeff=1)

Bases: qiskit.quantum_info.operators.linear_op.LinearOp

Scalar identity operator class.

This is a symbolic representation of an scalar identity operator on multiple subsystems. It may be used to initialize a symbolic scalar multiplication of an identity and then be implicitly converted to other kinds of operator subclasses by using the compose(), dot(), tensor(), expand() methods.

Initialize an operator object.

Parameters

• dims (int or tuple) – subsystem dimensions.

• coeff (Number) – scalar coefficient for the identity operator (Default: 1).

Raises

QiskitError – If the optional coefficient is invalid.

Methods

adjoint	Return the adjoint of the Operator.
compose	Return the operator composition with another ScalarOp.
conjugate	Return the conjugate of the ScalarOp.
copy	Make a deep copy of current operator.
dot	Return the right multiplied operator self * other.
expand	Return the reverse-order tensor product with another ScalarOp.
input_dims	Return tuple of input dimension for specified subsystems.
is_unitary	Return True if operator is a unitary matrix.
output_dims	Return tuple of output dimension for specified subsystems.
power	Return the power of the ScalarOp.
reshape	Return a shallow copy with reshaped input and output subsystem dimensions.
tensor	Return the tensor product with another ScalarOp.
to_matrix	Convert to a Numpy matrix.
to_operator	Convert to an Operator object.
transpose	Return the transpose of the ScalarOp.

Attributes

atol = 1e-08

coeff

Return the coefficient

dim

Return tuple (input_shape, output_shape).

num_qubits

Return the number of qubits if a N-qubit operator or None otherwise.

qargs

Return the qargs for the operator.

rtol = 1e-05

settings

Return operator settings.