Operation

class Operation(gate, location, params=[])

Bases: DifferentiableUnitary

An Operation groups together a gate, its parameters and location.

__init__(gate, location, params=[])

Construct an operation.

Parameters:

• gate (Gate) – The operation’s gate.

• location (CircuitLocationLike) – The set of qudits this gate is applied to.

• params (RealVector) – The parameters for the gate.

Raises:

• ValueError – If gate’s size doesn’t match location’s length.

• ValueError – If gate’s num_params doesn’t match params’s length.

Attributes

dim	The matrix dimension for this unitary.
gate	The operation's gate.
location	The qudit this operation is applied to.
num_params	The number of real parameters this unitary-valued function takes.
num_qudits	The number of qudits this unitary can act on.
params	The operation's parameters for its gate.
radixes	The number of orthogonal states for each qudit.

Methods

check_parameters(params)	Check parameters are valid and match the unitary.
get_grad([params])	Return the gradient for this operation.
get_inverse()	Return the operation's inverse operation.
get_qasm()	Return the qasm string for this operation.
get_unitary([params])	Return the unitary for this gate, see Unitary for more.
get_unitary_and_grad([params])	Return the unitary and gradient for this gate.
is_constant()	Return true if this unitary doesn't take parameters.
is_differentiable()	Check if operation is differentiable.
is_parameterized()	Return true if this unitary is parameterized.
is_qubit_only()	Return true if this unitary can only act on qubits.
is_qudit_only(radix)	Return true if this unitary can only act on radix-qudits.
is_qutrit_only()	Return true if this unitary can only act on qutrits.
is_self_inverse([params])	Checks whether the unitary is its own inverse.