U3Gate
- class U3Gate[source]
Bases:
QubitGate
,DifferentiableUnitary
,CachedClass
,GeneralGate
The U3 single qubit gate.
It is given by the following parameterized unitary:
- __init__()
Attributes
The matrix dimension for this unitary.
The name of this gate.
The number of real parameters this unitary-valued function takes.
The number of qudits this unitary can act on.
The qasm identifier for this gate.
The number of orthogonal states for each qudit.
Methods
calc_params
(utry)Calculate the three parameters to a U3Gate from a given unitary.
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_grad
([params])Return the gradient for this gate.
Return the inverse of this gate.
get_inverse_params
([params])Return the parameters that invert the gate, see
Gate
.get_qasm
(params, location)Returns the qasm string for this gate.
Returns a qasm gate definition block for this gate.
get_unitary
([params])Return the unitary for this gate, see
Unitary
for more.get_unitary_and_grad
([params])Return a tuple combining the outputs of get_unitary and get_grad.
identity_as_params
(radixes)Return the parameters for the gate that implements the identity.
Return true if this unitary doesn't take parameters.
Return true if this unitary is parameterized.
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.
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.