def qft(eng, circuit, qubits):
m = len(qubits)
for i in range(m - 1, -1, -1):
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(Rx(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
for j in range(2, i + 2):
circuit.apply_single_qubit_gate(Rz(-np.pi / 2), qubits[i - j + 1])
circuit.apply_single_qubit_gate(Rx(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
circuit.apply_ld_two_qubit_gate(ISwap, qubits[i - j + 1],
qubits[i])
circuit.apply_single_qubit_gate(Rx(np.pi / 2), qubits[i - j + 1])
circuit.apply_ld_two_qubit_gate(ISwap, qubits[i - j + 1],
qubits[i])
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(R(-calculate_phase(i) / 4),
qubits[i])
circuit.apply_single_qubit_gate(Rz(-np.pi / 2), qubits[i - j + 1])
circuit.apply_single_qubit_gate(Rx(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
circuit.apply_ld_two_qubit_gate(ISwap, qubits[i - j + 1],
qubits[i])
circuit.apply_single_qubit_gate(Rx(np.pi / 2), qubits[i - j + 1])
circuit.apply_ld_two_qubit_gate(ISwap, qubits[i - j + 1],
qubits[i])
circuit.apply_single_qubit_gate(Rz(np.pi / 2), qubits[i])
circuit.apply_single_qubit_gate(Rz(calculate_phase(i) / 4),
qubits[i - j + 1])
circuit.apply_single_qubit_gate(Rz(calculate_phase(i) / 4),
qubits[i])
def _decompose_time_evolution_individual_terms(cmd):
"""
Implements a TimeEvolution gate with a hamiltonian having only one term.
To implement exp(-i * t * hamiltonian), where the hamiltonian is only one
term, e.g., hamiltonian = X0 x Y1 X Z2, we first perform local
transformations to in order that all Pauli operators in the hamiltonian
are Z. We then implement exp(-i * t * (Z1 x Z2 x Z3) and transform the
basis back to the original. For more details see, e.g.,
James D. Whitfield, Jacob Biamonte & Aspuru-Guzik
Simulation of electronic structure Hamiltonians using quantum computers,
Molecular Physics, 109:5, 735-750 (2011).
or
Nielsen and Chuang, Quantum Computation and Information.
"""
assert len(cmd.qubits) == 1
qureg = cmd.qubits[0]
eng = cmd.engine
time = cmd.gate.time
hamiltonian = cmd.gate.hamiltonian
assert len(hamiltonian.terms) == 1
term = list(hamiltonian.terms)[0]
coefficient = hamiltonian.terms[term]
check_indices = set()
# Check that hamiltonian is not identity term,
# Previous or operator should have apply a global phase instead:
assert not term == ()
# hamiltonian has only a single local operator
if len(term) == 1:
with Control(eng, cmd.control_qubits):
if term[0][1] == 'X':
Rx(time * coefficient * 2.) | qureg[term[0][0]]
elif term[0][1] == 'Y':
Ry(time * coefficient * 2.) | qureg[term[0][0]]
else:
Rz(time * coefficient * 2.) | qureg[term[0][0]]
# hamiltonian has more than one local operator
else:
with Control(eng, cmd.control_qubits):
with Compute(eng):
# Apply local basis rotations
for index, action in term:
check_indices.add(index)
if action == 'X':
H | qureg[index]
elif action == 'Y':
Rx(math.pi / 2.) | qureg[index]
# Check that qureg had exactly as many qubits as indices:
assert check_indices == set((range(len(qureg))))
# Compute parity
for i in range(len(qureg) - 1):
CNOT | (qureg[i], qureg[i + 1])
Rz(time * coefficient * 2.) | qureg[-1]
# Uncompute parity and basis change
Uncompute(eng)
def test_local_optimizer_caching():
local_optimizer = _optimize.LocalOptimizer(m=4)
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend, engine_list=[local_optimizer])
# Test that it caches for each qubit 3 gates
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
assert len(backend.received_commands) == 0
H | qb0
H | qb1
CNOT | (qb0, qb1)
assert len(backend.received_commands) == 0
Rx(0.5) | qb0
assert len(backend.received_commands) == 1
assert backend.received_commands[0].gate == AllocateQubitGate()
H | qb0
assert len(backend.received_commands) == 2
assert backend.received_commands[1].gate == H
# Another gate on qb0 means it needs to send CNOT but clear pipeline of qb1
Rx(0.6) | qb0
for cmd in backend.received_commands:
print(cmd)
assert len(backend.received_commands) == 5
assert backend.received_commands[2].gate == AllocateQubitGate()
assert backend.received_commands[3].gate == H
assert backend.received_commands[3].qubits[0][0].id == qb1[0].id
assert backend.received_commands[4].gate == X
assert backend.received_commands[4].control_qubits[0].id == qb0[0].id
assert backend.received_commands[4].qubits[0][0].id == qb1[0].id
def test_dagger_with_dirty_qubits():
backend = DummyEngine(save_commands=True)
def allow_dirty_qubits(self, meta_tag):
return meta_tag == DirtyQubitTag
backend.is_meta_tag_handler = types.MethodType(allow_dirty_qubits, backend)
eng = MainEngine(backend=backend, engine_list=[DummyEngine()])
qubit = eng.allocate_qubit()
with _dagger.Dagger(eng):
ancilla = eng.allocate_qubit(dirty=True)
Rx(0.6) | ancilla
CNOT | (ancilla, qubit)
H | qubit
Rx(-0.6) | ancilla
del ancilla[0]
eng.flush(deallocate_qubits=True)
assert len(backend.received_commands) == 9
assert backend.received_commands[0].gate == Allocate
assert backend.received_commands[1].gate == Allocate
assert backend.received_commands[2].gate == Rx(0.6)
assert backend.received_commands[3].gate == H
assert backend.received_commands[4].gate == X
assert backend.received_commands[5].gate == Rx(-0.6)
assert backend.received_commands[6].gate == Deallocate
assert backend.received_commands[7].gate == Deallocate
assert backend.received_commands[1].tags == [DirtyQubitTag()]
assert backend.received_commands[6].tags == [DirtyQubitTag()]
def run(self, type):
"""
construct the prob dist according to the parameters trained using born machine.
:param type: str, forward or backward
:return:
"""
if type == 'forward':
for dep_index in range(self.depth + 1):
for i in range(self.num_qubits):
Rz(self.theta[dep_index, i, 0]) | self.qureg[i]
Rx(self.theta[dep_index, i, 1]) | self.qureg[i]
Rz(self.theta[dep_index, i, 2]) | self.qureg[i]
# entanglement
if dep_index == self.depth:
pass
else:
for ctrl_pair in self.ctrl_pairs:
CNOT | (self.qureg[ctrl_pair[0]],
self.qureg[ctrl_pair[1]])
elif type == 'backward':
for dep_index in range(self.depth, -1, -1):
# entanglement
if dep_index != self.depth:
for ctrl_pair in self.ctrl_pairs[::-1]:
CNOT | (self.qureg[ctrl_pair[0]],
self.qureg[ctrl_pair[1]])
for i in range(self.num_qubits):
Rz(self.theta[dep_index, i,
2]).get_inverse() | self.qureg[i]
Rx(self.theta[dep_index, i,
1]).get_inverse() | self.qureg[i]
Rz(self.theta[dep_index, i,
0]).get_inverse() | self.qureg[i]
def test_decomposition(angle):
for basis_state in ([1, 0], [0, 1]):
correct_dummy_eng = DummyEngine(save_commands=True)
correct_eng = MainEngine(backend=Simulator(), engine_list=[correct_dummy_eng])
rule_set = DecompositionRuleSet(modules=[rx2rz])
test_dummy_eng = DummyEngine(save_commands=True)
test_eng = MainEngine(
backend=Simulator(),
engine_list=[
AutoReplacer(rule_set),
InstructionFilter(rx_decomp_gates),
test_dummy_eng,
],
)
correct_qb = correct_eng.allocate_qubit()
Rx(angle) | correct_qb
correct_eng.flush()
test_qb = test_eng.allocate_qubit()
Rx(angle) | test_qb
test_eng.flush()
assert correct_dummy_eng.received_commands[1].gate == Rx(angle)
assert test_dummy_eng.received_commands[1].gate != Rx(angle)
for fstate in ['0', '1']:
test = test_eng.backend.get_amplitude(fstate, test_qb)
correct = correct_eng.backend.get_amplitude(fstate, correct_qb)
assert correct == pytest.approx(test, rel=1e-12, abs=1e-12)
Measure | test_qb
Measure | correct_qb
def test_aqt_retrieve(monkeypatch):
# patch send
def mock_retrieve(*args, **kwargs):
return [0, 6, 0, 6, 0, 0, 0, 6, 0, 6]
monkeypatch.setattr(_aqt, "retrieve", mock_retrieve)
backend = _aqt.AQTBackend(
retrieve_execution="a3877d18-314f-46c9-86e7-316bc4dbe968",
verbose=True)
eng = MainEngine(backend=backend, engine_list=[])
unused_qubit = eng.allocate_qubit()
qureg = eng.allocate_qureg(2)
# entangle the qureg
Ry(math.pi / 2) | qureg[0]
Rx(math.pi / 2) | qureg[0]
Rx(math.pi / 2) | qureg[0]
Ry(math.pi / 2) | qureg[0]
Rxx(math.pi / 2) | (qureg[0], qureg[1])
Rx(7 * math.pi / 2) | qureg[0]
Ry(7 * math.pi / 2) | qureg[0]
Rx(7 * math.pi / 2) | qureg[1]
del unused_qubit
# measure; should be all-0 or all-1
All(Measure) | qureg
# run the circuit
eng.flush()
prob_dict = eng.backend.get_probabilities([qureg[0], qureg[1]])
assert prob_dict['11'] == pytest.approx(0.4)
assert prob_dict['00'] == pytest.approx(0.6)
# Unknown qubit and no mapper
invalid_qubit = [Qubit(eng, 10)]
with pytest.raises(RuntimeError):
eng.backend.get_probabilities(invalid_qubit)
def test_compute_uncompute_no_additional_qubits():
# No ancilla qubit created in compute section
backend0 = DummyEngine(save_commands=True)
compare_engine0 = CompareEngine()
eng0 = MainEngine(backend=backend0, engine_list=[compare_engine0])
qubit = eng0.allocate_qubit()
with _compute.Compute(eng0):
Rx(0.5) | qubit
H | qubit
_compute.Uncompute(eng0)
eng0.flush(deallocate_qubits=True)
assert backend0.received_commands[0].gate == Allocate
assert backend0.received_commands[1].gate == Rx(0.5)
assert backend0.received_commands[2].gate == H
assert backend0.received_commands[3].gate == Rx(-0.5)
assert backend0.received_commands[4].gate == Deallocate
assert backend0.received_commands[0].tags == []
assert backend0.received_commands[1].tags == [_compute.ComputeTag()]
assert backend0.received_commands[2].tags == []
assert backend0.received_commands[3].tags == [_compute.UncomputeTag()]
assert backend0.received_commands[4].tags == []
# Same using CustomUncompute and test using CompareEngine
backend1 = DummyEngine(save_commands=True)
compare_engine1 = CompareEngine()
eng1 = MainEngine(backend=backend1, engine_list=[compare_engine1])
qubit = eng1.allocate_qubit()
with _compute.Compute(eng1):
Rx(0.5) | qubit
H | qubit
with _compute.CustomUncompute(eng1):
Rx(-0.5) | qubit
eng1.flush(deallocate_qubits=True)
assert compare_engine0 == compare_engine1
def test_command_get_merged(main_engine):
qubit = main_engine.allocate_qubit()
ctrl_qubit = main_engine.allocate_qubit()
cmd = _command.Command(main_engine, Rx(0.5), (qubit,))
cmd.tags = ["TestTag"]
cmd.add_control_qubits(ctrl_qubit)
# Merge two commands
cmd2 = _command.Command(main_engine, Rx(0.5), (qubit,))
cmd2.add_control_qubits(ctrl_qubit)
cmd2.tags = ["TestTag"]
merged_cmd = cmd.get_merged(cmd2)
expected_cmd = _command.Command(main_engine, Rx(1.0), (qubit,))
expected_cmd.add_control_qubits(ctrl_qubit)
expected_cmd.tags = ["TestTag"]
assert merged_cmd == expected_cmd
# Don't merge commands as different control qubits
cmd3 = _command.Command(main_engine, Rx(0.5), (qubit,))
cmd3.tags = ["TestTag"]
with pytest.raises(NotMergeable):
cmd.get_merged(cmd3)
# Don't merge commands as different tags
cmd4 = _command.Command(main_engine, Rx(0.5), (qubit,))
cmd4.add_control_qubits(ctrl_qubit)
with pytest.raises(NotMergeable):
cmd.get_merged(cmd4)
def CNOT(eng, circuit, b1, b2):
circuit.apply_single_qubit_gate(Rz(-np.pi / 2), b1)
circuit.apply_single_qubit_gate(Rx(np.pi / 2), b2)
circuit.apply_single_qubit_gate(Rz(np.pi / 2), b2)
circuit.apply_ld_two_qubit_gate(ISwap, b1, b2)
circuit.apply_single_qubit_gate(Rx(np.pi / 2), b1)
circuit.apply_ld_two_qubit_gate(ISwap, b1, b2)
circuit.apply_single_qubit_gate(Rz(np.pi / 2), b2)
def Swap(eng, circuit, b1, b2):
# circuit.apply_ld_two_qubit_gate(ops.Swap, b1, b2)
circuit.apply_ld_two_qubit_gate(ISwap, b1, b2)
circuit.apply_single_qubit_gate(Rx(-np.pi / 2), b2)
circuit.apply_ld_two_qubit_gate(ISwap, b1, b2)
circuit.apply_single_qubit_gate(Rx(-np.pi / 2), b1)
circuit.apply_ld_two_qubit_gate(ISwap, b1, b2)
circuit.apply_single_qubit_gate(Rx(-np.pi / 2), b2)
def test_decomposition():
for basis_state_index in range(0, 16):
basis_state = [0] * 16
basis_state[basis_state_index] = 1.0
correct_dummy_eng = DummyEngine(save_commands=True)
correct_eng = MainEngine(backend=Simulator(), engine_list=[correct_dummy_eng])
rule_set = DecompositionRuleSet(modules=[cnu2toffoliandcu])
test_dummy_eng = DummyEngine(save_commands=True)
test_eng = MainEngine(
backend=Simulator(),
engine_list=[
AutoReplacer(rule_set),
InstructionFilter(_decomp_gates),
test_dummy_eng,
],
)
test_sim = test_eng.backend
correct_sim = correct_eng.backend
correct_qb = correct_eng.allocate_qubit()
correct_ctrl_qureg = correct_eng.allocate_qureg(3)
correct_eng.flush()
test_qb = test_eng.allocate_qubit()
test_ctrl_qureg = test_eng.allocate_qureg(3)
test_eng.flush()
correct_sim.set_wavefunction(basis_state, correct_qb + correct_ctrl_qureg)
test_sim.set_wavefunction(basis_state, test_qb + test_ctrl_qureg)
with Control(test_eng, test_ctrl_qureg[:2]):
Rx(0.4) | test_qb
with Control(test_eng, test_ctrl_qureg):
Ry(0.6) | test_qb
with Control(test_eng, test_ctrl_qureg):
X | test_qb
with Control(correct_eng, correct_ctrl_qureg[:2]):
Rx(0.4) | correct_qb
with Control(correct_eng, correct_ctrl_qureg):
Ry(0.6) | correct_qb
with Control(correct_eng, correct_ctrl_qureg):
X | correct_qb
test_eng.flush()
correct_eng.flush()
assert len(correct_dummy_eng.received_commands) == 9
assert len(test_dummy_eng.received_commands) == 25
for fstate in range(16):
binary_state = format(fstate, '04b')
test = test_sim.get_amplitude(binary_state, test_qb + test_ctrl_qureg)
correct = correct_sim.get_amplitude(binary_state, correct_qb + correct_ctrl_qureg)
assert correct == pytest.approx(test, rel=1e-12, abs=1e-12)
All(Measure) | test_qb + test_ctrl_qureg
All(Measure) | correct_qb + correct_ctrl_qureg
test_eng.flush(deallocate_qubits=True)
correct_eng.flush(deallocate_qubits=True)
def inversed_full_rotation(wavefunction, qsubset, parameter):
"""
The inversed operation of full_rotation() of the same parameter
"""
n_qubit = len(qsubset)
for i in range(len(qsubset)):
Rx(-parameter[2 * n_qubit + i]) | wavefunction[qsubset[i]]
Rz(-parameter[n_qubit + i]) | wavefunction[qsubset[i]]
Rx(-parameter[i]) | wavefunction[qsubset[i]]
def full_rotation(wavefunction, qsubset, parameter):
"""
Apply Rx(t1)Ry(t2)Rx(t3) rotation to all the qubits with different angle
"""
n_qubit = len(qsubset)
for i in range(len(qsubset)):
Rx(parameter[i]) | wavefunction[qsubset[i]]
Rz(parameter[n_qubit + i]) | wavefunction[qsubset[i]]
Rx(parameter[2 * n_qubit + i]) | wavefunction[qsubset[i]]
def initializeState(qreg, theta): Rx(np.pi) | qreg[0] Ry(np.pi / 2.0) | qreg[1] Rx(2.5*np.pi) | qreg[0] CNOT | (qreg[1], qreg[0]) Rz(theta) | qreg[0] CNOT | (qreg[1], qreg[0]) Ry(2.5*np.pi) | qreg[1] Rx(np.pi/2) | qreg[0]
def test_aqt_backend_functional_test(monkeypatch):
correct_info = {
'circuit': '[["Y", 0.5, [1]], ["X", 0.5, [1]], ["X", 0.5, [1]], '
'["Y", 0.5, [1]], ["MS", 0.5, [1, 2]], ["X", 3.5, [1]], '
'["Y", 3.5, [1]], ["X", 3.5, [2]]]',
'nq': 3,
'shots': 10,
'backend': {'name': 'simulator'},
}
def mock_send(*args, **kwargs):
assert args[0] == correct_info
return [0, 6, 0, 6, 0, 0, 0, 6, 0, 6]
monkeypatch.setattr(_aqt, "send", mock_send)
backend = _aqt.AQTBackend(verbose=True, num_runs=10)
# no circuit has been executed -> raises exception
with pytest.raises(RuntimeError):
backend.get_probabilities([])
mapper = BasicMapperEngine()
res = {}
for i in range(4):
res[i] = i
mapper.current_mapping = res
eng = MainEngine(backend=backend, engine_list=[mapper])
unused_qubit = eng.allocate_qubit()
qureg = eng.allocate_qureg(2)
# entangle the qureg
Ry(math.pi / 2) | qureg[0]
Rx(math.pi / 2) | qureg[0]
Rx(math.pi / 2) | qureg[0]
Ry(math.pi / 2) | qureg[0]
Rxx(math.pi / 2) | (qureg[0], qureg[1])
Rx(7 * math.pi / 2) | qureg[0]
Ry(7 * math.pi / 2) | qureg[0]
Rx(7 * math.pi / 2) | qureg[1]
All(Barrier) | qureg
del unused_qubit
# measure; should be all-0 or all-1
All(Measure) | qureg
# run the circuit
eng.flush()
prob_dict = eng.backend.get_probabilities([qureg[0], qureg[1]])
assert prob_dict['11'] == pytest.approx(0.4)
assert prob_dict['00'] == pytest.approx(0.6)
# Unknown qubit and no mapper
invalid_qubit = [WeakQubitRef(eng, 10)]
with pytest.raises(RuntimeError):
eng.backend.get_probabilities(invalid_qubit)
with pytest.raises(RuntimeError):
eng.backend.get_probabilities(eng.allocate_qubit())
def test_command_str():
qubit = Qureg([Qubit(main_engine, 0)])
ctrl_qubit = Qureg([Qubit(main_engine, 1)])
cmd = _command.Command(main_engine, Rx(0.5), (qubit, ))
cmd.tags = ["TestTag"]
cmd.add_control_qubits(ctrl_qubit)
assert str(cmd) == "CRx(0.5) | ( Qureg[1], Qureg[0] )"
cmd2 = _command.Command(main_engine, Rx(0.5), (qubit, ))
assert str(cmd2) == "Rx(0.5) | Qureg[0]"
def swap(self, node1, node2):
self.gates_applied += 6
self.single_applied += 3
self.two_applied += 3
ISwap | (node1.qubit.qubit, node2.qubit.qubit)
Rx(-np.pi / 2) | node2.qubit.qubit
ISwap | (node1.qubit.qubit, node2.qubit.qubit)
Rx(-np.pi / 2) | node1.qubit.qubit
ISwap | (node1.qubit.qubit, node2.qubit.qubit)
Rx(-np.pi / 2) | node2.qubit.qubit
def _decompose_cnot2rxx_P(cmd):
""" Decompose CNOT gate into Rxx gate. """
# Labelled 'P' for 'plus' because decomposition ends with a Ry(+pi/2)
ctrl = cmd.control_qubits
Ry(-math.pi / 2) | ctrl[0]
Ph(math.pi / 4) | ctrl[0]
Rx(-math.pi / 2) | ctrl[0]
Rx(math.pi / 2) | cmd.qubits[0][0]
Rxx(math.pi / 2) | (ctrl[0], cmd.qubits[0][0])
Ry(math.pi / 2) | ctrl[0]
def test_daggered_gate_tex_str():
daggered_gate = _metagates.DaggeredGate(Y)
str_Y = Y.tex_str() if hasattr(Y, 'tex_str') else str(Y)
assert daggered_gate.tex_str() == str_Y + r"${}^\dagger$"
# test for a gate with tex_str method
rx = Rx(0.5)
daggered_rx = _metagates.DaggeredGate(rx)
str_rx = rx.tex_str() if hasattr(rx, 'tex_str') else str(rx)
assert daggered_rx.tex_str() == str_rx + r"${}^\dagger$"
def _decompose_cnot2rxx_M(cmd): # pylint: disable=invalid-name
"""Decompose CNOT gate into Rxx gate."""
# Labelled 'M' for 'minus' because decomposition ends with a Ry(-pi/2)
ctrl = cmd.control_qubits
Ry(math.pi / 2) | ctrl[0]
Ph(7 * math.pi / 4) | ctrl[0]
Rx(-math.pi / 2) | ctrl[0]
Rx(-math.pi / 2) | cmd.qubits[0][0]
Rxx(math.pi / 2) | (ctrl[0], cmd.qubits[0][0])
Ry(-1 * math.pi / 2) | ctrl[0]
def test_command_is_identity(main_engine):
qubit = main_engine.allocate_qubit()
qubit2 = main_engine.allocate_qubit()
cmd = _command.Command(main_engine, Rx(0.0), (qubit,))
cmd2 = _command.Command(main_engine, Rx(0.5), (qubit2,))
inverse_cmd = cmd.get_inverse()
inverse_cmd2 = cmd2.get_inverse()
assert inverse_cmd.gate.is_identity()
assert cmd.gate.is_identity()
assert not inverse_cmd2.gate.is_identity()
assert not cmd2.gate.is_identity()
def test_recognize_correct_gates():
saving_backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=saving_backend)
qubit = eng.allocate_qubit()
ctrl_qubit = eng.allocate_qubit()
eng.flush()
Rx(0.3) | qubit
with Control(eng, ctrl_qubit):
Rx(0.4) | qubit
eng.flush(deallocate_qubits=True)
assert rx2rz._recognize_RxNoCtrl(saving_backend.received_commands[3])
assert not rx2rz._recognize_RxNoCtrl(saving_backend.received_commands[4])
def test_local_optimizer_mergeable_gates():
local_optimizer = _optimize.LocalOptimizer(m=4)
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend, engine_list=[local_optimizer])
# Test that it merges mergeable gates such as Rx
qb0 = eng.allocate_qubit()
for _ in range(10):
Rx(0.5) | qb0
assert len(backend.received_commands) == 0
eng.flush()
# Expect allocate, one Rx gate, and flush gate
assert len(backend.received_commands) == 3
assert backend.received_commands[1].gate == Rx(10 * 0.5)
def test_command_str(main_engine):
qubit = Qureg([Qubit(main_engine, 0)])
ctrl_qubit = Qureg([Qubit(main_engine, 1)])
cmd = _command.Command(main_engine, Rx(0.5 * math.pi), (qubit,))
cmd.tags = ["TestTag"]
cmd.add_control_qubits(ctrl_qubit)
cmd2 = _command.Command(main_engine, Rx(0.5 * math.pi), (qubit,))
if sys.version_info.major == 3:
assert cmd.to_string(symbols=False) == "CRx(1.570796326795) | ( Qureg[1], Qureg[0] )"
assert str(cmd2) == "Rx(1.570796326795) | Qureg[0]"
else:
assert cmd.to_string(symbols=False) == "CRx(1.5707963268) | ( Qureg[1], Qureg[0] )"
assert str(cmd2) == "Rx(1.5707963268) | Qureg[0]"
def generalized_rotation(wavefunction, qsubset, pauliword, evolution_time):
"""Apply e^{iPt} on the wavefunction
Args:
qsubset: The subset of qubits in the wavefunction that the operation applies on
pauliword: The Pauli word P in e^{iPt} 1:X,2:Y,3:Z
evolution_time: t in e^{iPt}
"""
HALF_PI = math.pi / 2
n_qubit = len(qsubset)
# Exponentiating each Pauli string requires five parts
# 1. Perform basis rotations
for p in range(0, n_qubit):
pop = pauliword[p] # Pauli op
if pop == 1:
H | wavefunction[qsubset[p]] # Hadamard
elif pop == 2:
Rx(HALF_PI) | wavefunction[qsubset[p]]
# 2. First set CNOTs
prev_index = None
for p in range(0, n_qubit):
pop = pauliword[p] # Pauli op
if pop == 0:
continue
if prev_index is not None:
CNOT | (wavefunction[prev_index], wavefunction[qsubset[p]])
prev_index = qsubset[p]
# 3. Rotation (Note kexp & Ntrot)
Rz(evolution_time * 2) | wavefunction[prev_index]
# 4. Second set of CNOTs
prev_index = None
for p in reversed(range(0, n_qubit)):
pop = pauliword[p] # Pauli op
if pop == 0:
continue
if prev_index is not None:
CNOT | (wavefunction[qsubset[p]], wavefunction[prev_index])
prev_index = qsubset[p]
# 5. Rotate back to Z basis
for p in range(0, len(pauliword)):
pop = pauliword[p] # Pauli op
if pop == 1:
H | wavefunction[qsubset[p]] # Hadamard
elif pop == 2:
Rx(-HALF_PI) | wavefunction[qsubset[p]]
def test_unitary_is_available():
sim = UnitarySimulator()
qb0 = WeakQubitRef(engine=None, idx=0)
qb1 = WeakQubitRef(engine=None, idx=1)
qb2 = WeakQubitRef(engine=None, idx=2)
qb3 = WeakQubitRef(engine=None, idx=2)
qb4 = WeakQubitRef(engine=None, idx=2)
qb5 = WeakQubitRef(engine=None, idx=2)
qb6 = WeakQubitRef(engine=None, idx=2)
assert sim.is_available(Command(None, Allocate, qubits=([qb0], )))
assert sim.is_available(Command(None, Deallocate, qubits=([qb0], )))
assert sim.is_available(Command(None, Measure, qubits=([qb0], )))
assert sim.is_available(Command(None, X, qubits=([qb0], )))
assert sim.is_available(Command(None, Rx(1.2), qubits=([qb0], )))
assert sim.is_available(Command(None, Rxx(1.2), qubits=([qb0, qb1], )))
assert sim.is_available(Command(None, X, qubits=([qb0], ), controls=[qb1]))
assert sim.is_available(
Command(None, X, qubits=([qb0], ), controls=[qb1], control_state='1'))
assert not sim.is_available(Command(None, BasicGate(), qubits=([qb0], )))
assert not sim.is_available(
Command(None, X, qubits=([qb0], ), controls=[qb1], control_state='0'))
with pytest.warns(UserWarning):
assert sim.is_available(
Command(
None,
MatrixGate(np.identity(2**7)),
qubits=([qb0, qb1, qb2, qb3, qb4, qb5, qb6], ),
))
def test_store_returns_correct_qasm(self):
angle = 0.1
self.__store_function_assert_equal(0, NOT, "\nx q[0]")
self.__store_function_assert_equal(1,
NOT,
"\ncnot q[0], q[1]",
count=1)
self.__store_function_assert_equal(0, Swap, "\nswap q[0], q[1]")
self.__store_function_assert_equal(1,
X,
"\ntoffoli q[0], q[1], q[1]",
count=2)
self.__store_function_assert_equal(1, Z, "\ncz q[0], q[1]", count=1)
self.__store_function_assert_equal(0, Barrier,
"\n# barrier gate q[0], q[1];")
self.__store_function_assert_equal(
1, Rz(angle), "\ncr q[0],q[1],{0:.12f}".format(angle), count=1)
self.__store_function_assert_equal(
1, R(angle), "\ncr q[0],q[1],{0:.12f}".format(angle), count=1)
self.__store_function_assert_equal(1, Rx(angle),
"\nrx q[1],{0}".format(angle))
self.__store_function_assert_equal(1, Ry(angle),
"\nry q[1],{0}".format(angle))
self.__store_function_assert_equal(1, Rz(angle),
"\nrz q[1],{0}".format(angle))
self.__store_function_assert_equal(0, X, "\nx q[0]")
self.__store_function_assert_equal(0, Y, "\ny q[0]")
self.__store_function_assert_equal(0, Z, "\nz q[0]")
self.__store_function_assert_equal(0, H, "\nh q[0]")
self.__store_function_assert_equal(0, S, "\ns q[0]")
self.__store_function_assert_equal(0, Sdag, "\nsdag q[0]")
self.__store_function_assert_equal(0, T, "\nt q[0]")
self.__store_function_assert_equal(0, Tdag, "\ntdag q[0]")
def test_tensor_or():
saving_backend = DummyEngine(save_commands=True)
main_engine = MainEngine(backend=saving_backend,
engine_list=[DummyEngine()])
gate = Rx(0.6)
qubit0 = Qubit(main_engine, 0)
qubit1 = Qubit(main_engine, 1)
qubit2 = Qubit(main_engine, 2)
# Option 1:
_metagates.Tensor(gate) | ([qubit0, qubit1, qubit2], )
# Option 2:
_metagates.Tensor(gate) | [qubit0, qubit1, qubit2]
received_commands = []
# Remove Allocate and Deallocate gates
for cmd in saving_backend.received_commands:
if not (isinstance(cmd.gate, FastForwardingGate)
or isinstance(cmd.gate, ClassicalInstructionGate)):
received_commands.append(cmd)
# Check results
assert len(received_commands) == 6
qubit_ids = []
for cmd in received_commands:
assert len(cmd.qubits) == 1
assert cmd.gate == gate
qubit_ids.append(cmd.qubits[0][0].id)
assert sorted(qubit_ids) == [0, 0, 1, 1, 2, 2]
def test_controlled_gate_or():
saving_backend = DummyEngine(save_commands=True)
main_engine = MainEngine(backend=saving_backend,
engine_list=[DummyEngine()])
gate = Rx(0.6)
qubit0 = Qubit(main_engine, 0)
qubit1 = Qubit(main_engine, 1)
qubit2 = Qubit(main_engine, 2)
qubit3 = Qubit(main_engine, 3)
expected_cmd = Command(main_engine, gate, ([qubit3], ))
expected_cmd.add_control_qubits([qubit0, qubit1, qubit2])
received_commands = []
# Option 1:
_metagates.ControlledGate(gate, 3) | ([qubit1], [qubit0], [qubit2
], [qubit3])
# Option 2:
_metagates.ControlledGate(gate, 3) | (qubit1, qubit0, qubit2, qubit3)
# Option 3:
_metagates.ControlledGate(gate, 3) | ([qubit1, qubit0], qubit2, qubit3)
# Option 4:
_metagates.ControlledGate(gate, 3) | (qubit1, [qubit0, qubit2], qubit3)
# Wrong option 5:
with pytest.raises(_metagates.ControlQubitError):
_metagates.ControlledGate(gate, 3) | (qubit1, [qubit0, qubit2, qubit3])
# Remove Allocate and Deallocate gates
for cmd in saving_backend.received_commands:
if not (isinstance(cmd.gate, FastForwardingGate)
or isinstance(cmd.gate, ClassicalInstructionGate)):
received_commands.append(cmd)
assert len(received_commands) == 4
for cmd in received_commands:
assert cmd == expected_cmd
