qml.gridsynth¶

gridsynth(tape, *, epsilon=0.0001, ppr_basis=False)[source]¶

Decomposes RZ and PhaseShift gates into the Clifford+T basis or the PPR basis.

Warning

This transform must be applied within a workflow compiled with pennylane.qjit(), as it is a frontend for Catalyst’s gridsynth compilation pass. Consult the Catalyst documentation for more information.

Parameters:

tape (QNode) – A quantum circuit.
epsilon (float) – The maximum permissible operator norm error per rotation gate. Defaults to 1e-4.
ppr_basis (bool) – If True, decompose into the PPR basis. If False, decompose into the Clifford+T basis. Defaults to False.

Example

@qml.qnode(qml.device("lightning.qubit", wires=1))
def circuit(x):
    qml.Hadamard(0)
    qml.RZ(x, 0)
    qml.PhaseShift(x * 0.2, 0)
    return qml.state()

gridsynth_circuit = qml.transforms.gridsynth(circuit, epsilon=1e-4)
qjitted_circuit = qml.qjit(gridsynth_circuit)

>>> circuit(1.1) 
[0.60282587-0.36959568j 0.5076395 +0.49224195j]
>>> qjitted_circuit(1.1) 
[0.6028324 -0.3695921j  0.50763281+0.49224355j]

Warning

Using an epsilon value smaller than 1e-7 may lead to inaccurate results or errors, due to potential integer overflow in the solver.

Warning

Note: Simulating with ppr_basis=True is currently not supported.

code/api/pennylane.gridsynth

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qml.gridsynth¶

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