def circuit(weight):
qml.kUpCCGSD(weight,
wires=wires,
k=k,
delta_sz=0,
init_state=init_state)
return qml.state()
def circuit_template(weights):
qml.kUpCCGSD(
weights,
wires=range(4),
k=1,
delta_sz=0,
init_state=np.array([1, 1, 0, 0]),
)
return qml.expval(qml.PauliZ(0))
def circuit():
qml.kUpCCGSD(
weights=weights,
wires=wires,
k=k,
delta_sz=delta_sz,
init_state=init_state,
)
return qml.expval(qml.PauliZ(0))
def circuit2():
qml.kUpCCGSD(
weights,
wires=["z", "a", "k", "e"],
k=1,
delta_sz=0,
init_state=np.array([0, 1, 0, 1]),
)
return qml.expval(qml.Identity("z"))
def circuit():
qml.kUpCCGSD(
weights,
wires=range(4),
k=1,
delta_sz=0,
init_state=np.array([0, 1, 0, 1]),
)
return qml.expval(qml.Identity(0))
def test_id(self):
"""Test that the id attribute can be set."""
template = qml.kUpCCGSD(
qml.math.array([[0.55, 0.72, 0.6, 0.54, 0.42, 0.65]]),
wires=range(4),
k=1,
delta_sz=0,
init_state=qml.math.array([1, 1, 0, 0]),
id="a",
)
assert template.id == "a"
def test_excitations_wires_kupccgsd(self, wires, delta_sz,
generalized_singles_wires,
generalized_pair_doubles_wires):
"""Test the correctness of the wire indices for the generalized singles and paired doubles excitaitons
used by the template."""
shape = qml.kUpCCGSD.shape(k=1, n_wires=len(wires), delta_sz=delta_sz)
weights = np.pi / 2 * qml.math.ones(shape)
ref_state = qml.math.array([1, 1, 0, 0])
op = qml.kUpCCGSD(weights,
wires=wires,
k=1,
delta_sz=delta_sz,
init_state=ref_state)
gen_singles_wires, gen_doubles_wires = op.s_wires, op.d_wires
assert gen_singles_wires == generalized_singles_wires
assert gen_doubles_wires == generalized_pair_doubles_wires
def test_kupccgsd_operations(self, k, delta_sz, init_state, wires):
"""Test the correctness of the k-UpCCGSD template including the gate count
and order, the wires the operation acts on and the correct use of parameters
in the circuit."""
# wires for generalized single excitation terms
sz = np.array(
[0.5 if (i % 2 == 0) else -0.5 for i in range(len(wires))])
gen_single_terms_wires = [
wires[r:p + 1] if r < p else wires[p:r + 1][::-1]
for r in range(len(wires)) for p in range(len(wires))
if sz[p] - sz[r] == delta_sz and p != r
]
# wires for generalized pair coupled cluser double exictation terms
pair_double_terms_wires = [[wires[r:r + 2], wires[p:p + 2]]
for r in range(0,
len(wires) - 1, 2)
for p in range(0,
len(wires) - 1, 2) if p != r]
n_excit_terms = len(gen_single_terms_wires) + len(
pair_double_terms_wires)
weights = np.random.normal(0, 2 * np.pi, (k, n_excit_terms))
n_gates = 1 + n_excit_terms * k
exp_unitary = [qml.FermionicDoubleExcitation
] * len(pair_double_terms_wires)
exp_unitary += [qml.FermionicSingleExcitation
] * len(gen_single_terms_wires)
op = qml.kUpCCGSD(weights,
wires=wires,
k=k,
delta_sz=delta_sz,
init_state=init_state)
queue = op.expand().operations
# number of gates
assert len(queue) == n_gates
# initialization
assert isinstance(queue[0], qml.BasisEmbedding)
# order of gates
for op1, op2 in zip(queue[1:], exp_unitary):
assert isinstance(op1, op2)
# gate parameter
params = np.zeros((k, n_excit_terms))
for i in range(1, n_gates):
gate_index = (i - 1) % n_excit_terms
if gate_index < len(pair_double_terms_wires):
gate_index += len(gen_single_terms_wires)
else:
gate_index -= len(pair_double_terms_wires)
params[(i - 1) //
n_excit_terms][gate_index] = queue[i].parameters[0]
assert qml.math.allclose(params.flatten(), weights.flatten())
# gate wires
exp_wires = ([np.concatenate(w) for w in pair_double_terms_wires] +
gen_single_terms_wires) * k
res_wires = [queue[i].wires.tolist() for i in range(1, n_gates)]
for wires1, wires2 in zip(exp_wires, res_wires):
assert np.all(wires1 == wires2)