def test_build():
reg_ = Register.rectangle(2, 1, prefix="q")
sb = Sequence(reg_, device)
var = sb.declare_variable("var")
targ_var = sb.declare_variable("targ_var", size=2, dtype=int)
sb.declare_channel("ch1", "rydberg_local")
sb.declare_channel("ch2", "raman_local")
sb.target_index(targ_var[0], "ch2")
sb.target_index(targ_var[1], "ch1")
wf = BlackmanWaveform(var * 100, np.pi)
pls = Pulse.ConstantDetuning(wf, var, var)
sb.add(pls, "ch1")
sb.delay(var * 50, "ch1")
sb.align("ch2", "ch1")
sb.phase_shift_index(var, targ_var[0])
pls2 = Pulse.ConstantPulse(var * 100, var, var, 0)
sb.add(pls2, "ch2")
sb.measure()
with pytest.warns(UserWarning, match="No declared variables"):
sb.build(t=100, var=2, targ_var=reg_.find_indices(["q1", "q0"]))
with pytest.raises(TypeError, match="Did not receive values for"):
sb.build(var=2)
seq = sb.build(var=2, targ_var=reg_.find_indices(["q1", "q0"]))
assert seq._schedule["ch2"][-1].tf == 500
assert seq.current_phase_ref("q1") == 2.0
assert seq.current_phase_ref("q0") == 0.0
assert seq._measurement == "ground-rydberg"
s = sb.serialize()
sb_ = Sequence.deserialize(s)
assert str(sb) == str(sb_)
s2 = sb_.serialize()
sb_2 = Sequence.deserialize(s2)
assert str(sb) == str(sb_2)
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_slm_mask():
reg = Register({"q0": (0, 0), "q1": (10, 10), "q2": (-10, -10)})
targets = ["q0", "q2"]
pulse1 = Pulse.ConstantPulse(100, 10, 0, 0)
pulse2 = Pulse.ConstantPulse(200, 10, 0, 0)
# Set mask when an XY pulse is already in the schedule
seq_xy1 = Sequence(reg, MockDevice)
seq_xy1.declare_channel("ch_xy", "mw_global")
seq_xy1.add(pulse1, "ch_xy")
seq_xy1.config_slm_mask(targets)
assert seq_xy1._slm_mask_time == [0, 100]
# Set mask and then add an XY pulse to the schedule
seq_xy2 = Sequence(reg, MockDevice)
seq_xy2.config_slm_mask(targets)
seq_xy2.declare_channel("ch_xy", "mw_global")
seq_xy2.add(pulse1, "ch_xy")
assert seq_xy2._slm_mask_time == [0, 100]
# Check that adding extra pulses does not change SLM mask time
seq_xy2.add(pulse2, "ch_xy")
assert seq_xy2._slm_mask_time == [0, 100]
# Check that SLM mask time is updated accordingly if a new pulse with
# earlier start is added
seq_xy3 = Sequence(reg, MockDevice)
seq_xy3.declare_channel("ch_xy1", "mw_global")
seq_xy3.config_slm_mask(targets)
seq_xy3.delay(duration=100, channel="ch_xy1")
seq_xy3.add(pulse1, "ch_xy1")
assert seq_xy3._slm_mask_time == [100, 200]
seq_xy3.declare_channel("ch_xy2", "mw_global")
seq_xy3.add(pulse1, "ch_xy2", "no-delay")
assert seq_xy3._slm_mask_time == [0, 100]
# Same as previous check, but mask is added afterwards
seq_xy4 = Sequence(reg, MockDevice)
seq_xy4.declare_channel("ch_xy1", "mw_global")
seq_xy4.delay(duration=100, channel="ch_xy1")
seq_xy4.add(pulse1, "ch_xy1")
seq_xy4.declare_channel("ch_xy2", "mw_global")
seq_xy4.add(pulse1, "ch_xy2", "no-delay")
seq_xy4.config_slm_mask(targets)
assert seq_xy4._slm_mask_time == [0, 100]
# Check that paramatrize works with SLM mask
seq_xy5 = Sequence(reg, MockDevice)
seq_xy5.declare_channel("ch", "mw_global")
var = seq_xy5.declare_variable("var")
seq_xy5.add(Pulse.ConstantPulse(200, var, 0, 0), "ch")
assert seq_xy5.is_parametrized()
seq_xy5.config_slm_mask(targets)
seq_xy5_str = seq_xy5.serialize()
seq_xy5_ = Sequence.deserialize(seq_xy5_str)
assert str(seq_xy5) == str(seq_xy5_)
# Check drawing method
with patch("matplotlib.pyplot.show"):
seq_xy2.draw()
def test_min_pulse_duration():
seq = Sequence(reg, device)
seq.declare_channel("ch0", "rydberg_global")
seq.declare_channel("ch1", "rydberg_local")
seq.target("q0", "ch1")
pulse0 = Pulse.ConstantPulse(60, 1, 1, 0)
pulse1 = Pulse.ConstantPulse(80, 1, 1, 0)
seq.add(pulse1, "ch1")
assert seq._min_pulse_duration() == 80
seq.add(pulse0, "ch0")
seq.delay(52, "ch0")
seq.target("q1", "ch1")
seq.add(pulse1, "ch1")
assert seq._min_pulse_duration() == 60
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_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_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])
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_delay_min_duration():
# Check that a delay shorter than a channel's minimal duration
# is automatically extended to that minimal duration
seq = Sequence(reg, device)
seq.declare_channel("ch0", "rydberg_global")
seq.declare_channel("ch1", "rydberg_local")
seq.target("q0", "ch1")
pulse0 = Pulse.ConstantPulse(52, 1, 1, 0)
pulse1 = Pulse.ConstantPulse(180, 1, 1, 0)
seq.add(pulse1, "ch1")
seq.add(pulse0, "ch0")
seq.target("q1", "ch1")
seq.add(pulse1, "ch1")
min_duration = seq._channels["ch1"].min_duration
assert seq._schedule["ch1"][3] == _TimeSlot("delay", 220,
220 + min_duration, {"q1"})
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_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.), 1., 0), 'ch0')
one_sim = Simulation(seq)
one_res = one_sim.run()
assert (one_res._size == one_sim._size)
def test_mappable_register():
layout = TriangularLatticeLayout(100, 5)
mapp_reg = layout.make_mappable_register(10)
seq = Sequence(mapp_reg, Chadoq2)
assert seq.is_register_mappable()
reserved_qids = tuple([f"q{i}" for i in range(10)])
assert seq._qids == set(reserved_qids)
with pytest.raises(RuntimeError, match="Can't access the qubit info"):
seq.qubit_info
with pytest.raises(RuntimeError,
match="Can't access the sequence's register"):
seq.register
seq.declare_channel("ryd", "rydberg_global")
seq.declare_channel("ram", "raman_local", initial_target="q2")
seq.add(Pulse.ConstantPulse(100, 1, 0, 0), "ryd")
seq.add(Pulse.ConstantPulse(200, 1, 0, 0), "ram")
assert seq._last("ryd").targets == set(reserved_qids)
assert seq._last("ram").targets == {"q2"}
with pytest.raises(ValueError, match="Can't draw the register"):
seq.draw(draw_register=True)
# Can draw if 'draw_register=False'
with patch("matplotlib.pyplot.show"):
seq.draw()
with pytest.raises(ValueError, match="'qubits' must be specified"):
seq.build()
with pytest.raises(ValueError,
match="targeted but have not been assigned"):
seq.build(qubits={"q0": 1, "q1": 10})
with pytest.warns(UserWarning, match="No declared variables named: a"):
seq.build(qubits={"q2": 20, "q0": 10}, a=5)
seq_ = seq.build(qubits={"q2": 20, "q0": 10})
assert seq_._last("ryd").targets == {"q2", "q0"}
assert not seq_.is_register_mappable()
assert seq_.register == Register({
"q0": layout.traps_dict[10],
"q2": layout.traps_dict[20]
})
with pytest.raises(ValueError, match="already has a concrete register"):
seq_.build(qubits={"q2": 20, "q0": 10})
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_magnetic_field():
seq = Sequence(reg, MockDevice)
with pytest.raises(
AttributeError,
match="only defined when the sequence "
"is in 'XY Mode'.",
):
seq.magnetic_field
seq.declare_channel("ch0", "mw_global") # seq in XY mode
# mag field is the default
assert np.all(seq.magnetic_field == np.array((0.0, 0.0, 30.0)))
seq.set_magnetic_field(bx=1.0, by=-1.0, bz=0.5)
assert np.all(seq.magnetic_field == np.array((1.0, -1.0, 0.5)))
with pytest.raises(ValueError, match="magnitude greater than 0"):
seq.set_magnetic_field(bz=0.0)
assert seq._empty_sequence
seq.add(Pulse.ConstantPulse(100, 1, 1, 0), "ch0")
assert not seq._empty_sequence
with pytest.raises(ValueError, match="can only be set on an empty seq"):
seq.set_magnetic_field(1.0, 0.0, 0.0)
seq2 = Sequence(reg, MockDevice)
seq2.declare_channel("ch0", "rydberg_global") # not in XY mode
with pytest.raises(ValueError, match="can only be set in 'XY Mode'."):
seq2.set_magnetic_field(1.0, 0.0, 0.0)
seq3 = Sequence(reg, MockDevice)
seq3.set_magnetic_field(1.0, 0.0, 0.0) # sets seq to XY mode
assert set(seq3.available_channels) == {"mw_global"}
seq3.declare_channel("ch0", "mw_global")
# Does not change to default
assert np.all(seq3.magnetic_field == np.array((1.0, 0.0, 0.0)))
var = seq3.declare_variable("var")
# Sequence is marked as non-empty when parametrized too
seq3.add(Pulse.ConstantPulse(100, var, 1, 0), "ch0")
assert seq3.is_parametrized()
with pytest.raises(ValueError, match="can only be set on an empty seq"):
seq3.set_magnetic_field()
seq3_str = seq3.serialize()
seq3_ = Sequence.deserialize(seq3_str)
assert seq3_._in_xy
assert str(seq3) == str(seq3_)
assert np.all(seq3_.magnetic_field == np.array((1.0, 0.0, 0.0)))
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_str():
reg_ = Register.rectangle(2, 1, prefix="q")
sb = Sequence(reg_, device)
sb.declare_channel("ch1", "rydberg_global")
with pytest.warns(UserWarning, match="Building a non-parametrized"):
seq = sb.build()
var = sb.declare_variable("var")
pls = Pulse.ConstantPulse(var * 100, var, -1, var)
sb.add(pls, "ch1")
s = (f"Prelude\n-------\n{str(seq)}Stored calls\n------------\n\n" +
"1. add(Pulse.ConstantPulse(mul(var, 100), var, -1, var), ch1)")
assert s == str(sb)
def test_str():
seq = Sequence(reg, device)
seq.declare_channel("ch0", "raman_local", initial_target="q0")
pulse = Pulse.ConstantPulse(500, 2, -10, 0, post_phase_shift=np.pi)
seq.add(pulse, "ch0")
seq.delay(200, "ch0")
seq.target("q7", "ch0")
seq.measure("digital")
msg = ("Channel: ch0\nt: 0 | Initial targets: q0 | Phase Reference: 0.0 " +
"\nt: 0->500 | Pulse(Amp=2 rad/µs, Detuning=-10 rad/µs, Phase=0) " +
"| Targets: q0\nt: 500->700 | Delay \nt: 700->700 | Target: q7 | " +
"Phase Reference: 0.0\n\nMeasured in basis: digital")
assert seq.__str__() == msg
def test_str():
seq = Sequence(reg, device)
seq.declare_channel('ch0', 'raman_local', initial_target='q0')
pulse = Pulse.ConstantPulse(500, 2, -10, 0, post_phase_shift=np.pi)
seq.add(pulse, 'ch0')
seq.delay(200, 'ch0')
seq.target('q7', 'ch0')
seq.measure('digital')
msg = ('Channel: ch0\nt: 0 | Initial targets: q0 | Phase Reference: 0.0 ' +
'\nt: 0->500 | Pulse(Amp=2 rad/µs, Detuning=-10 rad/µs, Phase=0) ' +
'| Targets: q0\nt: 500->700 | Delay \nt: 700->700 | Target: q7 | ' +
'Phase Reference: 0.0\n\nMeasured in basis: digital')
assert seq.__str__() == msg
def test_creation():
with pytest.raises(TypeError):
Pulse(10, 0, 0, post_phase_shift=2)
Pulse(cwf, 1, 0)
Pulse(0, bwf, 1)
Pulse(bwf, cwf, bwf)
Pulse(bwf, cwf, 0, post_phase_shift=cwf)
with pytest.raises(ValueError, match="The duration of"):
Pulse(bwf, cwf, 0)
with pytest.raises(ValueError, match="All samples of an amplitude"):
Pulse(cwf, cwf, 0)
Pulse.ConstantAmplitude(-1, cwf, 0)
Pulse.ConstantPulse(100, -1, 0, 0)
assert pls.phase == 0
assert pls2 == pls3
assert pls != pls4
assert pls4.detuning != cwf
assert pls4.amplitude == pls.amplitude
def test_get_hamiltonian():
simple_reg = Register.from_coordinates([[10, 0], [0, 0]], prefix='atom')
detun = 1.
rise = Pulse.ConstantDetuning(RampWaveform(1500, 0., 2.), detun, 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='larger than'):
simple_sim.get_hamiltonian(1650)
with pytest.raises(ValueError, match='negative'):
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 (simple_ham[0, 0] == Chadoq2.interaction_coeff / 10**6 - 2 * detun)
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_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_creation():
with pytest.raises(TypeError):
Pulse(10, 0, 0, post_phase_shift=2)
Pulse(cwf, 1, 0)
Pulse(0, bwf, 1)
Pulse(bwf, cwf, bwf)
Pulse(bwf, cwf, 0, post_phase_shift=cwf)
with pytest.raises(ValueError, match="durations don't match"):
Pulse(bwf, cwf, 0)
with pytest.raises(ValueError, match="has always to be non-negative."):
Pulse(cwf, cwf, 0)
Pulse.ConstantAmplitude(-1, cwf, 0)
Pulse.ConstantPulse(100, -1, 0, 0)
assert pls.phase == 0
assert pls2.amplitude == pls3.amplitude
assert pls2.detuning == pls3.detuning
assert pls2.phase == np.pi
assert pls3.phase == 1
assert pls4.detuning != cwf
assert pls4.amplitude == pls.amplitude
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_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_measure():
pulse = Pulse.ConstantPulse(500, 2, -10, 0, post_phase_shift=np.pi)
seq = Sequence(reg, MockDevice)
seq.declare_channel("ch0", "rydberg_global")
assert "XY" in MockDevice.supported_bases
with pytest.raises(ValueError, match="not supported"):
seq.measure(basis="XY")
seq.measure()
with pytest.raises(RuntimeError, match="already been measured"):
seq.measure(basis="digital")
with pytest.raises(RuntimeError, match="Nothing more can be added."):
seq.add(pulse, "ch0")
seq = Sequence(reg, MockDevice)
seq.declare_channel("ch0", "mw_global")
assert "digital" in MockDevice.supported_bases
with pytest.raises(ValueError, match="not supported"):
seq.measure(basis="digital")
seq.measure(basis="XY")
def test_draw_register():
# Draw 2d register from sequence
reg = Register({"q0": (0, 0), "q1": (10, 10), "q2": (-10, -10)})
targets = ["q0", "q2"]
pulse = Pulse.ConstantPulse(100, 10, 0, 0)
seq = Sequence(reg, MockDevice)
seq.declare_channel("ch_xy", "mw_global")
seq.add(pulse, "ch_xy")
seq.config_slm_mask(targets)
with patch("matplotlib.pyplot.show"):
seq.draw(draw_register=True)
# Draw 3d register from sequence
reg3d = Register3D.cubic(3, 8)
seq3d = Sequence(reg3d, MockDevice)
seq3d.declare_channel("ch_xy", "mw_global")
seq3d.add(pulse, "ch_xy")
seq3d.config_slm_mask([6, 15])
with patch("matplotlib.pyplot.show"):
seq3d.draw(draw_register=True)
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_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_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"
