def test_sample_final_state_noisy():
np.random.seed(123)
assert results_noisy.sample_final_state(N_samples=1234) == Counter({
"00":
140,
"01":
227,
"10":
221,
"11":
646
})
res_3level = Simulation(seq_no_meas_noisy,
config=SimConfig(noise=("SPAM", "doppler"),
runs=10))
final_state = res_3level.run().states[-1]
assert np.isclose(
final_state.full(),
np.array([
[0.64 + 0.0j, 0.0 + 0.0j, 0.0 + 0.0j, 0.0 + 0.0j],
[0.0 + 0.0j, 0.14 + 0.0j, 0.0 + 0.0j, 0.0 + 0.0j],
[0.0 + 0.0j, 0.0 + 0.0j, 0.1 + 0.0j, 0.0 + 0.0j],
[0.0 + 0.0j, 0.0 + 0.0j, 0.0 + 0.0j, 0.12 + 0.0j],
]),
).all()
def test_dephasing():
np.random.seed(123)
reg = Register.from_coordinates([(0, 0)], prefix="q")
seq = Sequence(reg, Chadoq2)
seq.declare_channel("ch0", "rydberg_global")
duration = 2500
pulse = Pulse.ConstantPulse(duration, np.pi, 0.0 * 2 * np.pi, 0)
seq.add(pulse, "ch0")
sim = Simulation(seq,
sampling_rate=0.01,
config=SimConfig(noise="dephasing"))
assert sim.run().sample_final_state() == Counter({"0": 595, "1": 405})
assert len(sim._collapse_ops) != 0
with pytest.warns(UserWarning, match="first-order"):
reg = Register.from_coordinates([(0, 0), (0, 10)], prefix="q")
seq2 = Sequence(reg, Chadoq2)
seq2.declare_channel("ch0", "rydberg_global")
duration = 2500
pulse = Pulse.ConstantPulse(duration, np.pi, 0.0 * 2 * np.pi, 0)
seq2.add(pulse, "ch0")
sim = Simulation(
seq2,
sampling_rate=0.01,
config=SimConfig(noise="dephasing", dephasing_prob=0.5),
)
def test_empty_sequences():
seq = Sequence(reg, MockDevice)
with pytest.raises(ValueError, match="no declared channels"):
Simulation(seq)
seq.declare_channel("ch0", "mw_global")
with pytest.raises(ValueError, match="No instructions given"):
Simulation(seq)
seq = Sequence(reg, MockDevice)
seq.declare_channel("test", "rydberg_local", "target")
seq.declare_channel("test2", "rydberg_global")
with pytest.raises(ValueError, match="No instructions given"):
Simulation(seq)
def test_noisy_xy():
np.random.seed(15092021)
simple_reg = Register.square(2, prefix="atom")
detun = 1.0
amp = 3.0
rise = Pulse.ConstantPulse(1500, amp, detun, 0.0)
simple_seq = Sequence(simple_reg, MockDevice)
simple_seq.declare_channel("ch0", "mw_global")
simple_seq.add(rise, "ch0")
sim = Simulation(simple_seq, sampling_rate=0.01)
with pytest.raises(NotImplementedError,
match="mode 'XY' does not support simulation of"):
sim.set_config(SimConfig(("SPAM", "doppler")))
sim.set_config(SimConfig("SPAM", eta=0.4))
assert sim._bad_atoms == {
"atom0": True,
"atom1": False,
"atom2": True,
"atom3": False,
}
with pytest.raises(NotImplementedError,
match="simulation of noise types: amplitude"):
sim.add_config(SimConfig("amplitude"))
def test_expect():
with pytest.raises(TypeError, match="must be a list"):
results.expect("bad_observable")
with pytest.raises(TypeError, match="Incompatible type"):
results.expect(["bad_observable"])
with pytest.raises(ValueError, match="Incompatible shape"):
results.expect([np.array(3)])
reg_single = Register.from_coordinates([(0, 0)], prefix="q")
seq_single = Sequence(reg_single, Chadoq2)
seq_single.declare_channel("ryd", "rydberg_global")
seq_single.add(pi, "ryd")
sim_single = Simulation(seq_single)
results_single = sim_single.run()
op = [qutip.basis(2, 0).proj()]
exp = results_single.expect(op)[0]
assert np.isclose(exp[-1], 1)
assert len(exp) == duration + 1 # +1 for the final instant
np.testing.assert_almost_equal(
results_single._calc_pseudo_density(-1).full(),
np.array([[1, 0], [0, 0]]),
)
config = SimConfig(noise="SPAM", eta=0)
sim_single.set_config(config)
sim_single.evaluation_times = "Minimal"
results_single = sim_single.run()
exp = results_single.expect(op)[0]
assert len(exp) == 2
assert isinstance(results_single, CoherentResults)
assert results_single._meas_errors == {
"epsilon": config.epsilon,
"epsilon_prime": config.epsilon_prime,
}
# Probability of measuring 1 = probability of false positive
assert np.isclose(exp[0], config.epsilon)
# Probability of measuring 1 = 1 - probability of false negative
assert np.isclose(exp[-1], 1 - config.epsilon_prime)
np.testing.assert_almost_equal(
results_single._calc_pseudo_density(-1).full(),
np.array([[1 - config.epsilon_prime, 0], [0, config.epsilon_prime]]),
)
seq3dim = Sequence(reg, Chadoq2)
seq3dim.declare_channel("ryd", "rydberg_global")
seq3dim.declare_channel("ram", "raman_local", initial_target="A")
seq3dim.add(pi, "ram")
seq3dim.add(pi, "ryd")
sim3dim = Simulation(seq3dim)
exp3dim = sim3dim.run().expect(
[qutip.tensor(qutip.basis(3, 0).proj(), qutip.qeye(3))])
assert np.isclose(exp3dim[0][-1], 1.89690200e-14)
def test_sample_final_state():
np.random.seed(123)
sim_no_meas = Simulation(seq_no_meas, config=SimConfig(runs=1))
results_no_meas = sim_no_meas.run()
assert results_no_meas.sample_final_state() == Counter({
"00": 88,
"01": 156,
"10": 188,
"11": 568
})
with pytest.raises(NotImplementedError, match="dimension > 3"):
results_large_dim = deepcopy(results)
results_large_dim._dim = 7
results_large_dim.sample_final_state()
sampling = results.sample_final_state(1234)
assert len(sampling) == 4 # Check that all states were observed.
results._meas_basis = "digital"
sampling0 = results.sample_final_state(N_samples=911)
assert sampling0 == {"00": 911}
seq_no_meas.declare_channel("raman", "raman_local", "B")
seq_no_meas.add(pi, "raman")
res_3level = Simulation(seq_no_meas).run()
# Raman pi pulse on one atom will not affect other,
# even with global pi on rydberg
assert len(res_3level.sample_final_state()) == 2
res_3level._meas_basis = "ground-rydberg"
sampling_three_levelB = res_3level.sample_final_state()
# Rydberg will affect both:
assert len(sampling_three_levelB) == 4
def test_extraction_of_sequences():
sim = Simulation(seq)
for channel in seq.declared_channels:
addr = seq.declared_channels[channel].addressing
basis = seq.declared_channels[channel].basis
if addr == "Global":
for slot in seq._schedule[channel]:
if isinstance(slot.type, Pulse):
samples = sim.samples[addr][basis]
assert (samples["amp"][slot.ti:slot.tf] ==
slot.type.amplitude.samples).all()
assert (samples["det"][slot.ti:slot.tf] ==
slot.type.detuning.samples).all()
assert (samples["phase"][slot.ti:slot.tf] ==
slot.type.phase).all()
elif addr == "Local":
for slot in seq._schedule[channel]:
if isinstance(slot.type, Pulse):
for qubit in slot.targets: # TO DO: multiaddressing??
samples = sim.samples[addr][basis][qubit]
assert (samples["amp"][slot.ti:slot.tf] ==
slot.type.amplitude.samples).all()
assert (samples["det"][slot.ti:slot.tf] ==
slot.type.detuning.samples).all()
assert (samples["phase"][slot.ti:slot.tf] ==
slot.type.phase).all()
def test_get_hamiltonian():
simple_reg = Register.from_coordinates([[10, 0], [0, 0]], prefix="atom")
detun = 1.0
rise = Pulse.ConstantDetuning(RampWaveform(1500, 0.0, 2.0), detun, 0.0)
simple_seq = Sequence(simple_reg, Chadoq2)
simple_seq.declare_channel("ising", "rydberg_global")
simple_seq.add(rise, "ising")
simple_sim = Simulation(simple_seq, sampling_rate=0.01)
with pytest.raises(ValueError, match="less than or equal to"):
simple_sim.get_hamiltonian(1650)
with pytest.raises(ValueError, match="greater than or equal to"):
simple_sim.get_hamiltonian(-10)
# Constant detuning, so |rr><rr| term is C_6/r^6 - 2*detuning for any time
simple_ham = simple_sim.get_hamiltonian(143)
assert np.isclose(simple_ham[0, 0],
Chadoq2.interaction_coeff / 10**6 - 2 * detun)
np.random.seed(123)
simple_sim_noise = Simulation(simple_seq,
config=SimConfig(noise="doppler",
temperature=20000))
simple_ham_noise = simple_sim_noise.get_hamiltonian(144)
assert np.isclose(
simple_ham_noise.full(),
np.array([
[
4.47984523 + 0.0j,
0.09606404 + 0.0j,
0.09606404 + 0.0j,
0.0 + 0.0j,
],
[
0.09606404 + 0.0j,
12.03082372 + 0.0j,
0.0 + 0.0j,
0.09606404 + 0.0j,
],
[
0.09606404 + 0.0j,
0.0 + 0.0j,
-12.97113702 + 0.0j,
0.09606404 + 0.0j,
],
[0.0 + 0.0j, 0.09606404 + 0.0j, 0.09606404 + 0.0j, 0.0 + 0.0j],
]),
).all()
def test_add_max_step_and_delays():
reg = Register.from_coordinates([(0, 0)])
seq = Sequence(reg, Chadoq2)
seq.declare_channel("ch", "rydberg_global")
seq.delay(1500, "ch")
seq.add(Pulse.ConstantDetuning(BlackmanWaveform(600, np.pi), 0, 0), "ch")
seq.delay(2000, "ch")
seq.add(Pulse.ConstantDetuning(BlackmanWaveform(600, np.pi / 2), 0, 0),
"ch")
sim = Simulation(seq)
res_large_max_step = sim.run(max_step=1)
res_auto_max_step = sim.run()
r = qutip.basis(2, 0)
occ_large = res_large_max_step.expect([r.proj()])[0]
occ_auto = res_auto_max_step.expect([r.proj()])[0]
assert np.isclose(occ_large[-1], 0, 1e-4)
assert np.isclose(occ_auto[-1], 0.5, 1e-4)
def test_results_xy():
q_dict = {
"A": np.array([0.0, 0.0]),
"B": np.array([0.0, 10.0]),
}
reg = Register(q_dict)
duration = 1000
pi = Pulse.ConstantDetuning(BlackmanWaveform(duration, np.pi), 0.0, 0)
seq = Sequence(reg, MockDevice)
# Declare Channels
seq.declare_channel("ch0", "mw_global")
seq.add(pi, "ch0")
seq.measure("XY")
sim = Simulation(seq)
results = sim.run()
ground = qutip.tensor([qutip.basis(2, 1), qutip.basis(2, 1)])
assert results._dim == 2
assert results._size == 2
assert results._basis_name == "XY"
assert results._meas_basis == "XY"
assert results.states[0] == ground
with pytest.raises(TypeError, match="Can't reduce a system in"):
results.get_final_state(reduce_to_basis="all")
with pytest.raises(TypeError, match="Can't reduce a system in"):
results.get_final_state(reduce_to_basis="ground-rydberg")
with pytest.raises(TypeError, match="Can't reduce a system in"):
results.get_final_state(reduce_to_basis="digital")
state = results.get_final_state(reduce_to_basis="XY")
assert np.all(
np.isclose(np.abs(state.full()),
np.abs(results.states[-1].full()),
atol=1e-5))
# Check that measurement projectors are correct
assert results._meas_projector(0) == qutip.basis(2, 1).proj()
assert results._meas_projector(1) == qutip.basis(2, 0).proj()
def test_get_xy_hamiltonian():
simple_reg = Register.from_coordinates([[0, 10], [10, 0], [0, 0]],
prefix="atom")
detun = 1.0
amp = 3.0
rise = Pulse.ConstantPulse(1500, amp, detun, 0.0)
simple_seq = Sequence(simple_reg, MockDevice)
simple_seq.declare_channel("ch0", "mw_global")
simple_seq.set_magnetic_field(0, 1.0, 0.0)
simple_seq.add(rise, "ch0")
assert np.isclose(np.linalg.norm(simple_seq.magnetic_field[0:2]), 1)
simple_sim = Simulation(simple_seq, sampling_rate=0.03)
with pytest.raises(ValueError,
match="less than or equal to the sequence duration"):
simple_sim.get_hamiltonian(1650)
with pytest.raises(ValueError, match="greater than or equal to 0"):
simple_sim.get_hamiltonian(-10)
# Constant detuning, so |ud><du| term is C_3/r^3 - 2*detuning for any time
simple_ham = simple_sim.get_hamiltonian(143)
assert simple_ham[1, 2] == 0.5 * MockDevice.interaction_coeff_xy / 10**3
assert (np.abs(simple_ham[1, 4] -
(-2 * 0.5 * MockDevice.interaction_coeff_xy / 10**3)) <
1e-10)
assert simple_ham[0, 1] == 0.5 * amp
assert simple_ham[3, 3] == -2 * detun
def test_mask_two_pulses():
"""Similar to test_mask_equals_remove, but with more pulses afterwards.
Three global pulses act on a three qubit register, with one qubit masked
during the first pulse.
"""
reg_three = Register({"q0": (0, 0), "q1": (10, 10), "q2": (-10, -10)})
reg_two = Register({"q0": (0, 0), "q1": (10, 10)})
pulse = Pulse.ConstantPulse(100, 10, 0, 0)
no_pulse = Pulse.ConstantPulse(100, 0, 0, 0)
for channel_type in ["mw_global", "rydberg_global", "raman_global"]:
# Masked simulation
seq_masked = Sequence(reg_three, MockDevice)
seq_masked.declare_channel("ch_masked", channel_type)
masked_qubits = ["q2"]
seq_masked.config_slm_mask(masked_qubits)
seq_masked.add(pulse, "ch_masked") # First pulse: masked
seq_masked.add(pulse, "ch_masked") # Second pulse: unmasked
seq_masked.add(pulse, "ch_masked") # Third pulse: unmasked
sim_masked = Simulation(seq_masked)
# Unmasked simulation on full register
seq_three = Sequence(reg_three, MockDevice)
seq_three.declare_channel("ch_three", channel_type)
seq_three.add(no_pulse, "ch_three")
seq_three.add(pulse, "ch_three")
seq_three.add(pulse, "ch_three")
sim_three = Simulation(seq_three)
# Unmasked simulation on reduced register
seq_two = Sequence(reg_two, MockDevice)
seq_two.declare_channel("ch_two", channel_type)
seq_two.add(pulse, "ch_two")
seq_two.add(no_pulse, "ch_two")
seq_two.add(no_pulse, "ch_two")
sim_two = Simulation(seq_two)
ti = seq_masked._slm_mask_time[0]
tf = seq_masked._slm_mask_time[1]
for t in sim_masked.sampling_times:
ham_masked = sim_masked.get_hamiltonian(t)
ham_three = sim_three.get_hamiltonian(t)
ham_two = sim_two.get_hamiltonian(t)
if ti <= t <= tf:
assert ham_masked == qutip.tensor(ham_two, qutip.qeye(2))
else:
assert ham_masked == ham_three
def test_get_final_state_noisy():
np.random.seed(123)
seq_ = Sequence(reg, Chadoq2)
seq_.declare_channel("ram", "raman_local", initial_target="A")
seq_.add(pi, "ram")
noisy_config = SimConfig(noise=("SPAM", "doppler"))
sim_noisy = Simulation(seq_, config=noisy_config)
res3 = sim_noisy.run()
res3._meas_basis = "digital"
final_state = res3.get_final_state()
assert isdiagonal(final_state)
res3._meas_basis = "ground-rydberg"
assert (final_state[0, 0] == 0.06666666666666667 + 0j
and final_state[2, 2] == 0.92 + 0j)
assert res3.states[-1] == final_state
assert res3.results[-1] == Counter({
"10": 0.92,
"00": 0.06666666666666667,
"11": 0.013333333333333334
})
def test_get_final_state():
with pytest.raises(TypeError, match="Can't reduce"):
results.get_final_state(reduce_to_basis="digital")
assert (results.get_final_state(
reduce_to_basis="ground-rydberg",
ignore_global_phase=False) == results.states[-1].tidyup())
assert np.all(
np.isclose(
np.abs(results.get_final_state().full()),
np.abs(results.states[-1].full()),
))
seq_ = Sequence(reg, Chadoq2)
seq_.declare_channel("ryd", "rydberg_global")
seq_.declare_channel("ram", "raman_local", initial_target="A")
seq_.add(pi, "ram")
seq_.add(pi, "ram")
seq_.add(pi, "ryd")
sim_ = Simulation(seq_)
results_ = sim_.run()
with pytest.raises(ValueError, match="'reduce_to_basis' must be"):
results_.get_final_state(reduce_to_basis="all")
with pytest.raises(TypeError, match="Can't reduce to chosen basis"):
results_.get_final_state(reduce_to_basis="digital")
h_states = results_.get_final_state(reduce_to_basis="digital",
tol=1,
normalize=False).eliminate_states([0])
assert h_states.norm() < 3e-6
assert np.all(
np.isclose(
np.abs(
results_.get_final_state(
reduce_to_basis="ground-rydberg").full()),
np.abs(results.states[-1].full()),
atol=1e-5,
))
def test_add_config():
reg = Register.from_coordinates([(0, 0)], prefix="q")
seq = Sequence(reg, Chadoq2)
seq.declare_channel("ch0", "rydberg_global")
duration = 2500
pulse = Pulse.ConstantPulse(duration, np.pi, 0.0 * 2 * np.pi, 0)
seq.add(pulse, "ch0")
sim = Simulation(seq,
sampling_rate=0.01,
config=SimConfig(noise="SPAM", eta=0.5))
with pytest.raises(ValueError, match="is not a valid"):
sim.add_config("bad_cfg")
sim.add_config(
SimConfig(noise=("dephasing", "SPAM", "doppler"), temperature=20000))
assert "dephasing" in sim.config.noise and "SPAM" in sim.config.noise
assert sim.config.eta == 0.5
assert sim.config.temperature == 20000.0e-6
sim.set_config(SimConfig(noise="dephasing", laser_waist=175.0))
sim.add_config(SimConfig(noise=("SPAM", "amplitude"), laser_waist=172.0))
assert "amplitude" in sim.config.noise and "SPAM" in sim.config.noise
assert sim.config.laser_waist == 172.0
def test_run_xy():
simple_reg = Register.from_coordinates([[10, 0], [0, 0]], prefix="atom")
detun = 1.0
amp = 3.0
rise = Pulse.ConstantPulse(1500, amp, detun, 0.0)
simple_seq = Sequence(simple_reg, MockDevice)
simple_seq.declare_channel("ch0", "mw_global")
simple_seq.add(rise, "ch0")
sim = Simulation(simple_seq, sampling_rate=0.01)
good_initial_array = np.r_[1, np.zeros(sim.dim**sim._size - 1)]
good_initial_qobj = qutip.tensor(
[qutip.basis(sim.dim, 0) for _ in range(sim._size)])
sim.initial_state = good_initial_array
sim.run()
sim.initial_state = good_initial_qobj
sim.run()
assert not hasattr(sim._seq, "_measurement")
simple_seq.measure(basis="XY")
sim.run()
assert sim._seq._measurement == "XY"
def test_mask_nopulses():
"""Check interaction between SLM mask and a simulation with no pulses."""
reg = Register({"q0": (0, 0), "q1": (10, 10), "q2": (-10, -10)})
for channel_type in ["mw_global", "rydberg_global"]:
seq_empty = Sequence(reg, MockDevice)
if channel_type == "mw_global":
seq_empty.set_magnetic_field(0, 1.0, 0.0)
seq_empty.declare_channel("ch", channel_type)
seq_empty.delay(duration=100, channel="ch")
masked_qubits = ["q2"]
seq_empty.config_slm_mask(masked_qubits)
sim_empty = Simulation(seq_empty)
assert seq_empty._slm_mask_time == []
assert sim_empty._seq._slm_mask_time == []
def test_single_atom_simulation():
one_reg = Register.from_coordinates([(0, 0)], "atom")
one_seq = Sequence(one_reg, Chadoq2)
one_seq.declare_channel("ch0", "rydberg_global")
one_seq.add(Pulse.ConstantDetuning(ConstantWaveform(16, 1.0), 1.0, 0),
"ch0")
one_sim = Simulation(one_seq)
one_res = one_sim.run()
assert one_res._size == one_sim._size
one_sim = Simulation(one_seq, evaluation_times="Minimal")
one_resb = one_sim.run()
assert one_resb._size == one_sim._size
def test_noise():
sim2 = Simulation(seq,
sampling_rate=0.01,
config=SimConfig(noise=("SPAM"), eta=0.4))
sim2.run()
with pytest.raises(NotImplementedError, match="Cannot include"):
sim2.set_config(SimConfig(noise="dephasing"))
assert sim2.config.spam_dict == {
"eta": 0.4,
"epsilon": 0.01,
"epsilon_prime": 0.05,
}
def test_initialization_and_construction_of_hamiltonian():
fake_sequence = {"pulse1": "fake", "pulse2": "fake"}
with pytest.raises(TypeError, match="sequence has to be a valid"):
Simulation(fake_sequence)
sim = Simulation(seq, sampling_rate=0.011)
assert sim._seq == seq
assert sim._qdict == seq.qubit_info
assert sim._size == len(seq.qubit_info)
assert sim._tot_duration == duration * d
assert sim._qid_index == {"control1": 0, "target": 1, "control2": 2}
with pytest.raises(ValueError, match="too small, less than"):
Simulation(seq, sampling_rate=0.0001)
with pytest.raises(ValueError, match="`sampling_rate`"):
Simulation(seq, sampling_rate=5)
with pytest.raises(ValueError, match="`sampling_rate`"):
Simulation(seq, sampling_rate=-1)
assert sim._sampling_rate == 0.011
assert len(sim.sampling_times) == int(sim._sampling_rate *
sim._tot_duration)
assert isinstance(sim._hamiltonian, qutip.QobjEvo)
# Checks adapt() method:
assert bool(set(sim._hamiltonian.tlist).intersection(sim.sampling_times))
for qobjevo in sim._hamiltonian.ops:
for sh in qobjevo.qobj.shape:
assert sh == sim.dim**sim._size
assert not seq.is_parametrized()
seq_copy = seq.build() # Take a copy of the sequence
x = seq_copy.declare_variable("x")
seq_copy.add(Pulse.ConstantPulse(x, 1, 0, 0), "ryd")
assert seq_copy.is_parametrized()
with pytest.raises(ValueError, match="needs to be built"):
Simulation(seq_copy)
layout = RegisterLayout([[0, 0], [10, 10]])
mapp_reg = layout.make_mappable_register(1)
seq_ = Sequence(mapp_reg, Chadoq2)
assert seq_.is_register_mappable() and not seq_.is_parametrized()
with pytest.raises(ValueError, match="needs to be built"):
Simulation(seq_)
def test_cuncurrent_pulses():
reg = Register({"q0": (0, 0)})
seq = Sequence(reg, Chadoq2)
seq.declare_channel("ch_local", "rydberg_local", initial_target="q0")
seq.declare_channel("ch_global", "rydberg_global")
pulse = Pulse.ConstantPulse(20, 10, 0, 0)
seq.add(pulse, "ch_local")
seq.add(pulse, "ch_global", protocol="no-delay")
# Clean simulation
sim_no_noise = Simulation(seq)
# Noisy simulation
sim_with_noise = Simulation(seq)
config_doppler = SimConfig(noise=("doppler"))
sim_with_noise.set_config(config_doppler)
for t in sim_no_noise.evaluation_times:
ham_no_noise = sim_no_noise.get_hamiltonian(t)
ham_with_noise = sim_with_noise.get_hamiltonian(t)
assert ham_no_noise[0, 1] == ham_with_noise[0, 1]
def test_mask_equals_remove():
"""Check that masking is equivalent to removing the masked qubits.
A global pulse acting on three qubits of which one is masked, should be
equivalent to acting on a register with only the two unmasked qubits.
"""
reg_three = Register({"q0": (0, 0), "q1": (10, 10), "q2": (-10, -10)})
reg_two = Register({"q0": (0, 0), "q1": (10, 10)})
pulse = Pulse.ConstantPulse(100, 10, 0, 0)
local_pulse = Pulse.ConstantPulse(200, 10, 0, 0)
for channel_type in ["mw_global", "rydberg_global", "raman_global"]:
# Masked simulation
seq_masked = Sequence(reg_three, MockDevice)
if channel_type == "mw_global":
seq_masked.set_magnetic_field(0, 1.0, 0.0)
else:
# Add a local channel acting on a masked qubit (has no effect)
seq_masked.declare_channel(
"local",
channel_type[:-len("global")] + "local",
initial_target="q2",
)
seq_masked.add(local_pulse, "local")
seq_masked.declare_channel("ch_masked", channel_type)
masked_qubits = ["q2"]
seq_masked.config_slm_mask(masked_qubits)
seq_masked.add(pulse, "ch_masked")
sim_masked = Simulation(seq_masked)
# Simulation on reduced register
seq_two = Sequence(reg_two, MockDevice)
if channel_type == "mw_global":
seq_two.set_magnetic_field(0, 1.0, 0.0)
seq_two.declare_channel("ch_two", channel_type)
if channel_type != "mw_global":
seq_two.delay(local_pulse.duration, "ch_two")
seq_two.add(pulse, "ch_two")
sim_two = Simulation(seq_two)
# Check equality
for t in sim_two.sampling_times:
ham_masked = sim_masked.get_hamiltonian(t)
ham_two = sim_two.get_hamiltonian(t)
assert ham_masked == qutip.tensor(ham_two, qutip.qeye(2))
def test_effective_size_disjoint():
simple_reg = Register.square(2, prefix="atom")
rise = Pulse.ConstantPulse(1500, 0, 0, 0)
for channel_type in ["mw_global", "rydberg_global", "raman_global"]:
np.random.seed(15092021)
seq = Sequence(simple_reg, MockDevice)
seq.declare_channel("ch0", channel_type)
seq.add(rise, "ch0")
seq.config_slm_mask(["atom1"])
sim = Simulation(seq, sampling_rate=0.01)
sim.set_config(SimConfig("SPAM", eta=0.4))
assert sim._bad_atoms == {
"atom0": True,
"atom1": False,
"atom2": True,
"atom3": False,
}
assert sim.get_hamiltonian(0) == 0 * sim.build_operator(
[("I", "global")])
def test_run():
sim = Simulation(seq, sampling_rate=0.01)
sim.set_config(SimConfig("SPAM", eta=0.0))
with patch("matplotlib.pyplot.show"):
with patch("matplotlib.pyplot.savefig"):
sim.draw(draw_phase_area=True, fig_name="my_fig.pdf")
bad_initial = np.array([1.0])
good_initial_array = np.r_[1, np.zeros(sim.dim**sim._size - 1)]
good_initial_qobj = qutip.tensor(
[qutip.basis(sim.dim, 0) for _ in range(sim._size)])
good_initial_qobj_no_dims = qutip.basis(sim.dim**sim._size, 2)
with pytest.raises(ValueError,
match="Incompatible shape of initial state"):
sim.initial_state = bad_initial
with pytest.raises(ValueError,
match="Incompatible shape of initial state"):
sim.initial_state = qutip.Qobj(bad_initial)
sim.initial_state = good_initial_array
sim.run()
sim.initial_state = good_initial_qobj
sim.run()
sim.initial_state = good_initial_qobj_no_dims
sim.run()
seq.measure("ground-rydberg")
sim.run()
assert sim._seq._measurement == "ground-rydberg"
sim.run(progress_bar=True)
sim.run(progress_bar=False)
sim.run(progress_bar=None)
with pytest.raises(
ValueError,
match="`progress_bar` must be a bool.",
):
sim.run(progress_bar=1)
sim.set_config(SimConfig("SPAM", eta=0.1))
with pytest.raises(
NotImplementedError,
match="Can't combine state preparation errors with an initial state "
"different from the ground.",
):
sim.run()
def test_eval_times():
with pytest.raises(ValueError,
match="evaluation_times float must be between 0 "
"and 1."):
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = 3.0
with pytest.raises(ValueError, match="Wrong evaluation time label."):
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = 123
with pytest.raises(ValueError, match="Wrong evaluation time label."):
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = "Best"
with pytest.raises(
ValueError,
match="Provided evaluation-time list contains "
"negative values.",
):
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = [-1, 0, sim.sampling_times[-2]]
with pytest.raises(
ValueError,
match="Provided evaluation-time list extends "
"further than sequence duration.",
):
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = [0, sim.sampling_times[-1] + 10]
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = "Full"
assert sim._eval_times_instruction == "Full"
np.testing.assert_almost_equal(
sim._eval_times_array,
sim.sampling_times,
)
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = "Minimal"
np.testing.assert_almost_equal(
sim._eval_times_array,
np.array([sim.sampling_times[0], sim._tot_duration / 1000]),
)
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = [
0,
sim.sampling_times[-3],
sim._tot_duration / 1000,
]
np.testing.assert_almost_equal(
sim._eval_times_array,
np.array([0, sim.sampling_times[-3], sim._tot_duration / 1000]),
)
sim.evaluation_times = []
np.testing.assert_almost_equal(
sim._eval_times_array,
np.array([0, sim._tot_duration / 1000]),
)
sim.evaluation_times = 0.0001
np.testing.assert_almost_equal(
sim._eval_times_array,
np.array([0, sim._tot_duration / 1000]),
)
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = [sim.sampling_times[-10], sim.sampling_times[-3]]
np.testing.assert_almost_equal(
sim._eval_times_array,
np.array([
0,
sim.sampling_times[-10],
sim.sampling_times[-3],
sim._tot_duration / 1000,
]),
)
sim = Simulation(seq, sampling_rate=1.0)
sim.evaluation_times = 0.4
np.testing.assert_almost_equal(
sim.sampling_times[np.linspace(
0,
len(sim.sampling_times) - 1,
int(0.4 * len(sim.sampling_times)),
dtype=int,
)],
sim._eval_times_array,
)
def test_config():
np.random.seed(123)
reg = Register.from_coordinates([(0, 0), (0, 5)], prefix="q")
seq = Sequence(reg, Chadoq2)
seq.declare_channel("ch0", "rydberg_global")
duration = 2500
pulse = Pulse.ConstantPulse(duration, np.pi, 0.0 * 2 * np.pi, 0)
seq.add(pulse, "ch0")
sim = Simulation(seq, config=SimConfig(noise="SPAM"))
sim.reset_config()
assert sim.config == SimConfig()
sim.show_config()
with pytest.raises(ValueError, match="not a valid"):
sim.set_config("bad_config")
clean_ham = sim.get_hamiltonian(123)
new_cfg = SimConfig(noise="doppler", temperature=10000)
sim.set_config(new_cfg)
assert sim.config == new_cfg
noisy_ham = sim.get_hamiltonian(123)
assert (noisy_ham[0, 0] != clean_ham[0, 0]
and noisy_ham[3, 3] == clean_ham[3, 3])
sim.set_config(SimConfig(noise="amplitude"))
noisy_amp_ham = sim.get_hamiltonian(123)
assert (noisy_amp_ham[0, 0] == clean_ham[0, 0]
and noisy_amp_ham[0, 1] != clean_ham[0, 1])
}
reg = Register(q_dict)
duration = 1000
pi = Pulse.ConstantDetuning(BlackmanWaveform(duration, np.pi), 0.0, 0)
seq = Sequence(reg, Chadoq2)
# Declare Channels
seq.declare_channel("ryd", "rydberg_global")
seq.add(pi, "ryd")
seq_no_meas = deepcopy(seq)
seq_no_meas_noisy = deepcopy(seq)
seq.measure("ground-rydberg")
sim = Simulation(seq)
cfg_noisy = SimConfig(noise=("SPAM", "doppler", "amplitude"))
sim_noisy = Simulation(seq, config=cfg_noisy)
results = sim.run()
results_noisy = sim_noisy.run()
state = qutip.tensor([qutip.basis(2, 0), qutip.basis(2, 0)])
ground = qutip.tensor([qutip.basis(2, 1), qutip.basis(2, 1)])
def test_initialization():
with pytest.raises(ValueError, match="`basis_name` must be"):
CoherentResults(state, 2, "bad_basis", None, [0])
with pytest.raises(
ValueError,
match="`meas_basis` must be 'ground-rydberg' or 'digital'."):
def test_building_basis_and_projection_operators():
# All three levels:
sim = Simulation(seq, sampling_rate=0.01)
assert sim.basis_name == "all"
assert sim.dim == 3
assert sim.basis == {
"r": qutip.basis(3, 0),
"g": qutip.basis(3, 1),
"h": qutip.basis(3, 2),
}
assert (sim.op_matrix["sigma_rr"] == qutip.basis(3, 0) *
qutip.basis(3, 0).dag())
assert (sim.op_matrix["sigma_gr"] == qutip.basis(3, 1) *
qutip.basis(3, 0).dag())
assert (sim.op_matrix["sigma_hg"] == qutip.basis(3, 2) *
qutip.basis(3, 1).dag())
# Check local operator building method:
with pytest.raises(ValueError, match="Duplicate atom"):
sim.build_operator([("sigma_gg", ["target", "target"])])
with pytest.raises(ValueError, match="not a valid operator"):
sim.build_operator([("wrong", ["target"])])
with pytest.raises(ValueError, match="Invalid qubit names: {'wrong'}"):
sim.build_operator([("sigma_gg", ["wrong"])])
# Check building operator with one operator
op_standard = sim.build_operator([("sigma_gg", ["target"])])
op_one = sim.build_operator(("sigma_gg", ["target"]))
assert np.linalg.norm(op_standard - op_one) < 1e-10
# Global ground-rydberg
seq2 = Sequence(reg, Chadoq2)
seq2.declare_channel("global", "rydberg_global")
seq2.add(pi, "global")
sim2 = Simulation(seq2, sampling_rate=0.01)
assert sim2.basis_name == "ground-rydberg"
assert sim2.dim == 2
assert sim2.basis == {"r": qutip.basis(2, 0), "g": qutip.basis(2, 1)}
assert (sim2.op_matrix["sigma_rr"] == qutip.basis(2, 0) *
qutip.basis(2, 0).dag())
assert (sim2.op_matrix["sigma_gr"] == qutip.basis(2, 1) *
qutip.basis(2, 0).dag())
# Digital
seq2b = Sequence(reg, Chadoq2)
seq2b.declare_channel("local", "raman_local", "target")
seq2b.add(pi, "local")
sim2b = Simulation(seq2b, sampling_rate=0.01)
assert sim2b.basis_name == "digital"
assert sim2b.dim == 2
assert sim2b.basis == {"g": qutip.basis(2, 0), "h": qutip.basis(2, 1)}
assert (sim2b.op_matrix["sigma_gg"] == qutip.basis(2, 0) *
qutip.basis(2, 0).dag())
assert (sim2b.op_matrix["sigma_hg"] == qutip.basis(2, 1) *
qutip.basis(2, 0).dag())
# Local ground-rydberg
seq2c = Sequence(reg, Chadoq2)
seq2c.declare_channel("local_ryd", "rydberg_local", "target")
seq2c.add(pi, "local_ryd")
sim2c = Simulation(seq2c, sampling_rate=0.01)
assert sim2c.basis_name == "ground-rydberg"
assert sim2c.dim == 2
assert sim2c.basis == {"r": qutip.basis(2, 0), "g": qutip.basis(2, 1)}
assert (sim2c.op_matrix["sigma_rr"] == qutip.basis(2, 0) *
qutip.basis(2, 0).dag())
assert (sim2c.op_matrix["sigma_gr"] == qutip.basis(2, 1) *
qutip.basis(2, 0).dag())
# Global XY
seq2 = Sequence(reg, MockDevice)
seq2.declare_channel("global", "mw_global")
seq2.add(pi, "global")
sim2 = Simulation(seq2, sampling_rate=0.01)
assert sim2.basis_name == "XY"
assert sim2.dim == 2
assert sim2.basis == {"u": qutip.basis(2, 0), "d": qutip.basis(2, 1)}
assert (sim2.op_matrix["sigma_uu"] == qutip.basis(2, 0) *
qutip.basis(2, 0).dag())
assert (sim2.op_matrix["sigma_du"] == qutip.basis(2, 1) *
qutip.basis(2, 0).dag())
assert (sim2.op_matrix["sigma_ud"] == qutip.basis(2, 0) *
qutip.basis(2, 1).dag())
