VariableUnitaryGate

class VariableUnitaryGate

Bases: GeneralGate

A Variable n-qudit unitary operator.

__init__(num_qudits, radixes=[])

Creates an VariableUnitaryGate, defaulting to a qubit gate.

Parameters:

• num_qudits (int) – The number of qudits this gate acts on.

• radixes (Sequence[int]) – The number of orthogonal states for each qudit. Defaults to qubits.

Attributes

dim	The matrix dimension for this unitary.
name	The name of this gate.
num_params	The number of real parameters this unitary-valued function takes.
num_qudits	The number of qudits this unitary can act on.
qasm_name	The qasm identifier for this gate.
radixes	The number of orthogonal states for each qudit.

Methods

calc_params(utry)	Return the parameters for this gate to implement utry
check_env_matrix(env_matrix)	Check to ensure the env_matrix is validly shaped.
check_parameters(params)	Check parameters are valid and match the unitary.
get_inverse()	Return the gate's inverse as a gate.
get_inverse_params([params])	Return the parameters that invert the gate.
get_params(utry)	Return the params for this gate, given a unitary matrix.
get_qasm(params, location)	Returns the qasm string for this gate.
get_qasm_gate_def()	Returns a qasm gate definition block for this gate.
get_unitary([params])	Return the unitary for this gate, see Unitary for more.
identity_as_params(radixes)	Return the parameters for the gate that implements the identity.
is_constant()	Return true if this unitary doesn't take parameters.
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.
optimize(env_matrix)	Return the optimal parameters with respect to an environment matrix.
with_all_frozen_params(params)	Freeze all of a gate's parameters so they don't change from optimization.
with_frozen_params(frozen_params)	Freeze some of a gate's parameters so they don't change from optimization.