def test_multi_qubit_gates(self):
"""Test that a tape with Ising gates has the correct metric tensor tapes."""
dev = qml.device("default.qubit", wires=3)
with qml.tape.JacobianTape() as tape:
qml.Hadamard(0)
qml.Hadamard(2)
qml.IsingXX(0.2, wires=[0, 1])
qml.IsingXX(-0.6, wires=[1, 2])
qml.IsingZZ(1.02, wires=[0, 1])
qml.IsingZZ(-4.2, wires=[1, 2])
tapes, proc_fn = qml.metric_tensor(tape, approx="block-diag")
assert len(tapes) == 4
assert [len(tape.operations) for tape in tapes] == [2, 4, 5, 6]
assert [len(tape.measurements) for tape in tapes] == [1] * 4
expected_ops = [
[qml.Hadamard, qml.QubitUnitary],
[qml.Hadamard, qml.Hadamard, qml.IsingXX, qml.QubitUnitary],
[
qml.Hadamard, qml.Hadamard, qml.IsingXX, qml.IsingXX,
qml.QubitUnitary
],
[
qml.Hadamard, qml.Hadamard, qml.IsingXX, qml.IsingXX,
qml.IsingZZ, qml.QubitUnitary
],
]
assert [[type(op) for op in tape.operations]
for tape in tapes] == expected_ops
def op(op_name):
ops_list = {
"RX": qml.RX(0.123, wires=0),
"RY": qml.RY(1.434, wires=0),
"RZ": qml.RZ(2.774, wires=0),
"S": qml.S(wires=0),
"SX": qml.SX(wires=0),
"T": qml.T(wires=0),
"CNOT": qml.CNOT(wires=[0, 1]),
"CZ": qml.CZ(wires=[0, 1]),
"CY": qml.CY(wires=[0, 1]),
"SWAP": qml.SWAP(wires=[0, 1]),
"ISWAP": qml.ISWAP(wires=[0, 1]),
"SISWAP": qml.SISWAP(wires=[0, 1]),
"SQISW": qml.SQISW(wires=[0, 1]),
"CSWAP": qml.CSWAP(wires=[0, 1, 2]),
"PauliRot": qml.PauliRot(0.123, "Y", wires=0),
"IsingXX": qml.IsingXX(0.123, wires=[0, 1]),
"IsingXY": qml.IsingXY(0.123, wires=[0, 1]),
"IsingYY": qml.IsingYY(0.123, wires=[0, 1]),
"IsingZZ": qml.IsingZZ(0.123, wires=[0, 1]),
"Identity": qml.Identity(wires=0),
"Rot": qml.Rot(0.123, 0.456, 0.789, wires=0),
"Toffoli": qml.Toffoli(wires=[0, 1, 2]),
"PhaseShift": qml.PhaseShift(2.133, wires=0),
"ControlledPhaseShift": qml.ControlledPhaseShift(1.777, wires=[0, 2]),
"CPhase": qml.CPhase(1.777, wires=[0, 2]),
"MultiRZ": qml.MultiRZ(0.112, wires=[1, 2, 3]),
"CRX": qml.CRX(0.836, wires=[2, 3]),
"CRY": qml.CRY(0.721, wires=[2, 3]),
"CRZ": qml.CRZ(0.554, wires=[2, 3]),
"Hadamard": qml.Hadamard(wires=0),
"PauliX": qml.PauliX(wires=0),
"PauliY": qml.PauliY(wires=0),
"PauliZ": qml.PauliZ(wires=0),
"CRot": qml.CRot(0.123, 0.456, 0.789, wires=[0, 1]),
"DiagonalQubitUnitary": qml.DiagonalQubitUnitary(np.array([1.0, 1.0j]), wires=1),
"ControlledQubitUnitary": qml.ControlledQubitUnitary(
np.eye(2) * 1j, wires=[0], control_wires=[2]
),
"MultiControlledX": qml.MultiControlledX(wires=(0, 1, 2), control_values="01"),
"SingleExcitation": qml.SingleExcitation(0.123, wires=[0, 3]),
"SingleExcitationPlus": qml.SingleExcitationPlus(0.123, wires=[0, 3]),
"SingleExcitationMinus": qml.SingleExcitationMinus(0.123, wires=[0, 3]),
"DoubleExcitation": qml.DoubleExcitation(0.123, wires=[0, 1, 2, 3]),
"DoubleExcitationPlus": qml.DoubleExcitationPlus(0.123, wires=[0, 1, 2, 3]),
"DoubleExcitationMinus": qml.DoubleExcitationMinus(0.123, wires=[0, 1, 2, 3]),
"QFT": qml.QFT(wires=0),
"QubitSum": qml.QubitSum(wires=[0, 1, 2]),
"QubitCarry": qml.QubitCarry(wires=[0, 1, 2, 3]),
"QubitUnitary": qml.QubitUnitary(np.eye(2) * 1j, wires=0),
}
return ops_list.get(op_name)
def circuit_ansatz(params, wires):
"""Circuit ansatz containing all the parametrized gates"""
qml.QubitStateVector(unitary_group.rvs(2**4, random_state=0)[0],
wires=wires)
qml.RX(params[0], wires=wires[0])
qml.RY(params[1], wires=wires[1])
qml.RX(params[2], wires=wires[2]).inv()
qml.RZ(params[0], wires=wires[3])
qml.CRX(params[3], wires=[wires[3], wires[0]])
qml.PhaseShift(params[4], wires=wires[2])
qml.CRY(params[5], wires=[wires[2], wires[1]])
qml.CRZ(params[5], wires=[wires[0], wires[3]]).inv()
qml.PhaseShift(params[6], wires=wires[0]).inv()
qml.Rot(params[6], params[7], params[8], wires=wires[0])
# # qml.Rot(params[8], params[8], params[9], wires=wires[1]).inv()
qml.MultiRZ(params[11], wires=[wires[0], wires[1]])
# # qml.PauliRot(params[12], "XXYZ", wires=[wires[0], wires[1], wires[2], wires[3]])
qml.CPhase(params[12], wires=[wires[3], wires[2]])
qml.IsingXX(params[13], wires=[wires[1], wires[0]])
qml.IsingXY(params[14], wires=[wires[3], wires[2]])
qml.IsingYY(params[14], wires=[wires[3], wires[2]])
qml.IsingZZ(params[14], wires=[wires[2], wires[1]])
qml.U1(params[15], wires=wires[0])
qml.U2(params[16], params[17], wires=wires[0])
qml.U3(params[18], params[19], params[20], wires=wires[1])
# # qml.CRot(params[21], params[22], params[23], wires=[wires[1], wires[2]]).inv() # expected tofail
qml.SingleExcitation(params[24], wires=[wires[2], wires[0]])
qml.DoubleExcitation(params[25],
wires=[wires[2], wires[0], wires[1], wires[3]])
qml.SingleExcitationPlus(params[26], wires=[wires[0], wires[2]])
qml.SingleExcitationMinus(params[27], wires=[wires[0], wires[2]])
qml.DoubleExcitationPlus(params[27],
wires=[wires[2], wires[0], wires[1], wires[3]])
qml.DoubleExcitationMinus(params[27],
wires=[wires[2], wires[0], wires[1], wires[3]])
qml.RX(params[28], wires=wires[0])
qml.RX(params[29], wires=wires[1])
"ControlledQubitUnitary": qml.ControlledQubitUnitary(np.eye(2), control_wires=[1], wires=[0]),
"MultiControlledX": qml.MultiControlledX(control_wires=[1, 2], wires=[0]),
"RX": qml.RX(0, wires=[0]),
"RY": qml.RY(0, wires=[0]),
"RZ": qml.RZ(0, wires=[0]),
"Rot": qml.Rot(0, 0, 0, wires=[0]),
"S": qml.S(wires=[0]),
"SWAP": qml.SWAP(wires=[0, 1]),
"ISWAP": qml.ISWAP(wires=[0, 1]),
"T": qml.T(wires=[0]),
"SX": qml.SX(wires=[0]),
"Toffoli": qml.Toffoli(wires=[0, 1, 2]),
"QFT": qml.templates.QFT(wires=[0, 1, 2]),
"IsingXX": qml.IsingXX(0, wires=[0, 1]),
"IsingYY": qml.IsingYY(0, wires=[0, 1]),
"IsingZZ": qml.IsingZZ(0, wires=[0, 1]),
"SingleExcitation": qml.SingleExcitation(0, wires=[0, 1]),
"SingleExcitationPlus": qml.SingleExcitationPlus(0, wires=[0, 1]),
"SingleExcitationMinus": qml.SingleExcitationMinus(0, wires=[0, 1]),
"DoubleExcitation": qml.DoubleExcitation(0, wires=[0, 1, 2, 3]),
"DoubleExcitationPlus": qml.DoubleExcitationPlus(0, wires=[0, 1, 2, 3]),
"DoubleExcitationMinus": qml.DoubleExcitationMinus(0, wires=[0, 1, 2, 3]),
"QubitCarry": qml.QubitCarry(wires=[0, 1, 2, 3]),
"QubitSum": qml.QubitSum(wires=[0, 1, 2]),
"PauliRot": qml.PauliRot(0, "XXYY", wires=[0, 1, 2, 3]),
"U1": qml.U1(0, wires=0),
"U2": qml.U2(0, 0, wires=0),
"U3": qml.U3(0, 0, 0, wires=0),
"SISWAP": qml.SISWAP(wires=[0, 1]),
}