def test_rotated_planar_rmps_decoder_cosets_probability_pair_optimisation(
mode):
code = RotatedPlanarCode(5, 5)
decoder = RotatedPlanarRMPSDecoder(mode=mode)
# probabilities
prob_dist = BiasedDepolarizingErrorModel(bias=10).probability_distribution(
probability=0.1)
# coset probabilities for null Pauli
coset_i_ps, _ = decoder._coset_probabilities(prob_dist, code.new_pauli())
coset_x_ps, _ = decoder._coset_probabilities(prob_dist,
code.new_pauli().logical_x())
# expect Pr(iIG) ~= Pr(xXG)
assert _is_close(
coset_i_ps[0], coset_x_ps[1], rtol=0,
atol=0), ('Coset probabilites do not satisfy Pr(iIG) ~= Pr(xXG)')
# expect Pr(iXG) ~= Pr(xIG)
assert _is_close(
coset_i_ps[1], coset_x_ps[0], rtol=0,
atol=0), ('Coset probabilites do not satisfy Pr(iXG) ~= Pr(xIG)')
# expect Pr(iZG) ~= Pr(xYG)
assert _is_close(
coset_i_ps[3], coset_x_ps[2], rtol=0,
atol=0), ('Coset probabilites do not satisfy Pr(iZG) ~= Pr(xYG)')
# expect Pr(iYG) ~= Pr(xZG)
assert _is_close(
coset_i_ps[2], coset_x_ps[3], rtol=0,
atol=0), ('Coset probabilites do not satisfy Pr(iYG) ~= Pr(xZG)')
def test_rotated_planar_mps_decoder_small_codes_exact_approx():
code = RotatedPlanarCode(5, 5)
exact_decoder = RotatedPlanarMPSDecoder()
approx_decoder = RotatedPlanarMPSDecoder(chi=8)
identity = code.new_pauli()
# probabilities
prob_dist = BiasedDepolarizingErrorModel(bias=10).probability_distribution(
probability=0.1)
# coset probabilities
exact_coset_ps, _ = exact_decoder._coset_probabilities(prob_dist, identity)
approx_coset_ps, _ = approx_decoder._coset_probabilities(
prob_dist, identity)
print('#exact Pr(G)=', exact_coset_ps)
print('#approx Pr(G)=', approx_coset_ps)
assert all(_is_close(
exact_coset_ps, approx_coset_ps, rtol=1e-11, atol=0)), (
'Coset probabilites do not satisfy exact Pr(G) ~= approx Pr(G)')
def test_rotated_planar_mps_decoder_cosets_probability_inequality(mode, rtol):
code = RotatedPlanarCode(25, 25)
decoder = RotatedPlanarMPSDecoder(chi=5, mode=mode)
# probabilities
prob_dist = DepolarizingErrorModel().probability_distribution(0.1)
# coset probabilities for null Pauli
coset_ps, _ = decoder._coset_probabilities(prob_dist, code.new_pauli())
coset_i_p, coset_x_p, coset_y_p, coset_z_p = coset_ps
# expect Pr(IG) > Pr(XG) ~= Pr(ZG) > Pr(YG)
print('{} > {} ~= {} > {}. rtol={}'.format(
coset_i_p, coset_x_p, coset_z_p, coset_y_p,
abs(coset_x_p - coset_z_p) / abs(coset_z_p)))
print('types: Pr(IG):{}, Pr(XG):{}, Pr(ZG):{}, Pr(YG):{}'.format(
type(coset_i_p), type(coset_x_p), type(coset_z_p), type(coset_y_p)))
assert coset_i_p > coset_x_p, 'Coset probabilites do not satisfy Pr(IG) > Pr(XG)'
assert coset_i_p > coset_z_p, 'Coset probabilites do not satisfy Pr(IG) > Pr(ZG)'
assert _is_close(
coset_x_p, coset_z_p, rtol=rtol,
atol=0), 'Coset probabilites do not satisfy Pr(XG) ~= Pr(ZG)'
assert coset_x_p > coset_y_p, 'Coset probabilites do not satisfy Pr(XG) > Pr(YG)'
assert coset_z_p > coset_y_p, 'Coset probabilites do not satisfy Pr(ZG) > Pr(YG)'
def test_rotated_planar_rmps_mps_performance():
from qecsim.models.rotatedplanar import RotatedPlanarMPSDecoder
n_run = 5
code = RotatedPlanarCode(17, 17)
error_model = DepolarizingErrorModel()
error_probability = 0.2
def _timed_runs(decoder):
start_time = time.time()
for _ in range(n_run):
error = error_model.generate(code, error_probability)
syndrome = pt.bsp(error, code.stabilizers.T)
recovery = decoder.decode(code, syndrome)
assert np.all(pt.bsp(recovery ^ error, code.stabilizers.T) == 0), (
'recovery ^ error ({} ^ {}) does not commute with stabilizers.'
.format(recovery, error))
return time.time() - start_time
rmps_time = _timed_runs(RotatedPlanarRMPSDecoder(chi=8))
mps_time = _timed_runs(RotatedPlanarMPSDecoder(chi=8))
# expect rmps_time > mps_time
print('rmps_time = {} < {} = mps_time'.format(rmps_time, mps_time))
assert rmps_time < mps_time, 'RMPS decoder slower than MPS decoder'
@property
def label(self):
return 'fixed'
@pytest.mark.parametrize('code, error_model, decoder', [
# each code with each valid decoder
(Color666Code(5), DepolarizingErrorModel(), Color666MPSDecoder(chi=8)),
(FiveQubitCode(), DepolarizingErrorModel(), NaiveDecoder()),
(PlanarCode(5, 5), DepolarizingErrorModel(), PlanarCMWPMDecoder()),
(PlanarCode(5, 5), DepolarizingErrorModel(), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), DepolarizingErrorModel(), PlanarMWPMDecoder()),
(PlanarCode(5, 5), DepolarizingErrorModel(), PlanarRMPSDecoder(chi=6)),
(PlanarCode(4, 5), BitPhaseFlipErrorModel(), PlanarYDecoder()),
(RotatedPlanarCode(7, 7), DepolarizingErrorModel(), RotatedPlanarMPSDecoder(chi=8)),
(RotatedPlanarCode(7, 7), DepolarizingErrorModel(), RotatedPlanarRMPSDecoder(chi=8)),
(RotatedPlanarCode(7, 7), BiasedDepolarizingErrorModel(100), RotatedPlanarSMWPMDecoder()),
(RotatedToricCode(6, 6), BiasedDepolarizingErrorModel(100), RotatedToricSMWPMDecoder()),
(SteaneCode(), DepolarizingErrorModel(), NaiveDecoder()),
(ToricCode(5, 5), DepolarizingErrorModel(), ToricMWPMDecoder()),
# each generic noise model
(PlanarCode(5, 5), BiasedDepolarizingErrorModel(10), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), BiasedYXErrorModel(10), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), BitFlipErrorModel(), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), BitPhaseFlipErrorModel(), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), CenterSliceErrorModel((0.2, 0.8, 0), 0.5), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), DepolarizingErrorModel(), PlanarMPSDecoder(chi=6)),
(PlanarCode(5, 5), PhaseFlipErrorModel(), PlanarMPSDecoder(chi=6)),
])
def test_run_once(code, error_model, decoder):
def test_rotated_planar_pauli_properties(size):
code = RotatedPlanarCode(*size)
pauli = code.new_pauli()
assert pauli.code == code
assert isinstance(repr(pauli), str)
assert isinstance(str(pauli), str)
def test_rotated_planar_pauli_operator_invalid_index(size, index):
pauli = RotatedPlanarCode(*size).new_pauli()
with pytest.raises(IndexError):
pauli.operator(index)
def test_rotated_planar_lattice_is_in_site_bounds(index, expected):
lattice = RotatedPlanarCode(3, 5)
assert lattice.is_in_site_bounds(index) == expected
(5, 3),
(4, 6),
(6, 4),
(3, 4),
(4, 3),
])
def test_rotated_planar_pauli_properties(size):
code = RotatedPlanarCode(*size)
pauli = code.new_pauli()
assert pauli.code == code
assert isinstance(repr(pauli), str)
assert isinstance(str(pauli), str)
@pytest.mark.parametrize('planar_pauli', [
RotatedPlanarCode(5, 5).new_pauli(),
RotatedPlanarCode(5, 6).new_pauli().plaquette((1, 1)).plaquette((3, 2)),
RotatedPlanarCode(5, 5).new_pauli().logical_x().plaquette(
(-1, 0)).plaquette((4, 1)),
RotatedPlanarCode(6, 5).new_pauli().logical_z().plaquette(
(1, 5)).plaquette((3, -1)),
RotatedPlanarCode(7, 5).new_pauli().logical_x().plaquette(
(0, 2)).plaquette((1, 1)),
RotatedPlanarCode(5, 7).new_pauli().logical_z().plaquette(
(1, -1)).plaquette((2, 4)),
])
def test_rotated_planar_pauli_new_to_bsf(planar_pauli):
assert planar_pauli.code.new_pauli(
planar_pauli.to_bsf()) == planar_pauli, (
'Conversion to_bsf+from_bsf does not result in equality.')
def test_rotated_planar_code_new_invalid_parameters(rows, columns):
with pytest.raises((ValueError, TypeError), match=r"^RotatedPlanarCode") as exc_info:
RotatedPlanarCode(rows, columns)
print(exc_info)
def test_rotated_planar_code_properties(size):
code = RotatedPlanarCode(*size)
assert isinstance(code.label, str)
assert isinstance(repr(code), str)
from qecsim.models.rotatedplanar import RotatedPlanarCode, RotatedPlanarMPSDecoder
if __name__=='__main__':
def square(a):
return a**2
vsquare=np.vectorize(square)
layout='rotated'
bdry_name='surface'
sizes= range(6,7,2)
# codes_and_size = [PlanarCode(*(size,size)) for size in sizes]
rotsizes= range(17,18,2)
codes_and_size = [RotatedPlanarCode(*(size,size)) for size in rotsizes]
p_min,p_max=0.01,0.50
error_probabilities=np.linspace(p_min,p_max,8)
#export data
# code_names=['spiral_XZ','random_XZ','random_XZ_YZ','random_XY']
# code_names=['random_all','random_XZ_YZ']
# # code_names=['spiral_XZ','random_XZ','random_all','random_XY']
# code_names=['XY','CSS']
bias_list=[50]
code_names=['XY','random_XZ_YZ4','random_XZ_YZ3','random_XZ_YZ2','random_XZ_YZ1','random_XZ_YZ0','rotXY']
code_names=['random_rot_XZ_YZ','rotXY']
def test_rotated_planar_lattice_size(size):
lattice = RotatedPlanarCode(*size)
assert lattice.size == size
def test_rotated_planar_code_validate(size):
code = RotatedPlanarCode(*size)
code.validate() # no error raised
@pytest.mark.parametrize('filename', [
os.path.join(FILES_DIR, 'incorrect_length_in_packed_error.jsonl'),
os.path.join(FILES_DIR, 'incorrect_length_in_packed_error2.jsonl')
])
def test_file_error_model_generate_incorrect_length_in_packed_error(filename):
fem = FileErrorModel(filename)
fqc = FiveQubitCode()
with pytest.raises(ValueError):
fem.generate(fqc, 0.4)
# TESTS FOR GENERATED SAMPLES BELOW
@pytest.mark.parametrize('code, filename, decoder', [
(RotatedPlanarCode(5, 5),
os.path.join(FILES_DIR, 'rotated_planar_code_size_5_J_0.1_p_2.jsonl'),
RotatedPlanarMPSDecoder(chi=8)),
(RotatedPlanarCode(5, 5),
os.path.join(FILES_DIR, 'rotated_planar_code_size_5_J_0.1_p_4.jsonl'),
RotatedPlanarMPSDecoder(chi=8)),
(RotatedPlanarCode(5, 5),
os.path.join(FILES_DIR, 'rotated_planar_code_size_5_J_0.1_p_6.jsonl'),
RotatedPlanarMPSDecoder(chi=8)),
])
def test_file_error_model_generated_sample_error_probability(code, filename, decoder):
with CliRunner().isolated_filesystem(): # isolate from logging_qecsim.ini
# error model and probability from sample
error_model = FileErrorModel(filename, start=1000)
e_prob = error_model._probability
# runs (repeat many times to ensure physical_error_rate is close to error_probability)
def test_rotated_planar_code_logicals():
assert len(RotatedPlanarCode(5, 5).logicals) == 2
def test_rotated_planar_code_stabilizers(size, expected):
assert len(RotatedPlanarCode(*size).stabilizers) == expected
def test_rotated_planar_code_n_k_d(size, expected):
code = RotatedPlanarCode(*size)
assert code.n_k_d == expected
print('Forward contraction result: ', repr(result_forwards))
assert isinstance(result_forwards,
mp.mpf), 'Contracted tensor network is not an mp.mpf'
assert 0 <= result_forwards <= 1, 'Contracted tensor network not within bounds'
result_backwards = tt.mps2d.contract(tn, start=-1, step=-1)
print('Backward contraction result:', repr(result_backwards))
assert isinstance(result_backwards,
mp.mpf), 'Contracted tensor network is not an mp.mpf'
assert 0 <= result_backwards <= 1, 'Contracted tensor network not within bounds'
assert _is_close(result_forwards, result_backwards, rtol=1e-14, atol=0), (
'Contracting forwards does not give the same result as contracting backwards'
)
@pytest.mark.parametrize('pauli', [
(RotatedPlanarCode(3, 3).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(4, 4).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(3, 4).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(4, 3).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(5, 5).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(4, 5).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(5, 4).new_pauli().site('Y', (2, 0), (2, 4))),
(RotatedPlanarCode(6, 6).new_pauli().site('Y', (2, 0), (2, 4))),
])
def test_rotatedplanar_mps2d_contract(pauli):
prob_dist = DepolarizingErrorModel().probability_distribution(0.1)
tnc = RotatedPlanarRMPSDecoder.TNC()
tn = tnc.create_tn(prob_dist, pauli)
print('tn.shape=', tn.shape)
result = tt.mps2d.contract(tn)
assert isinstance(result,
('asdf', 'c', None), # invalid chi
(None, None, None), # invalid mode
(None, 't', None), # invalid mode
(None, 2, None), # invalid mode
(None, 'c', -1), # invalid tol
(None, 'c', 'asdf'), # invalid tol
])
def test_rotated_planar_mps_decoder_new_invalid_parameters(chi, mode, tol):
with pytest.raises((ValueError, TypeError),
match=r"^RotatedPlanarMPSDecoder") as exc_info:
RotatedPlanarMPSDecoder(chi=chi, mode=mode, tol=tol)
print(exc_info)
@pytest.mark.parametrize('error_pauli', [
RotatedPlanarCode(3, 3).new_pauli().site('X', (1, 0)).site('Y', (2, 2)),
RotatedPlanarCode(5, 5).new_pauli().site('X',
(1, 1)).site('Y', (2, 2)).site(
'Z', (3, 2)),
RotatedPlanarCode(7, 7).new_pauli().site('X',
(4, 2)).site('Y', (3, 3)).site(
'Z', (6, 4), (6, 3)),
])
def test_rotated_planar_mps_decoder_sample_recovery(error_pauli):
print('ERROR:')
print(error_pauli)
error = error_pauli.to_bsf()
code = error_pauli.code
syndrome = pt.bsp(error, code.stabilizers.T)
print('SYNDROME:')
print(code.ascii_art(syndrome=syndrome))
]
layout = 'planar'
num_realiz = 1
bias_str = 'Z'
max_runs = 20000
elif code_name == 'XY':
codes_and_size = [
PlanarCode(*(size, size)) for size in sizes
]
layout = 'planar'
bias_str = 'Y'
num_realiz = 1
max_runs = 20000
elif code_name == 'rotXY':
codes_and_size = [
RotatedPlanarCode(*(size, size)) for size in rotsizes
]
decoder = _rotatedplanarmpsdecoder_def.RotatedPlanarMPSDecoder_def(
chi=chi_val)
layout = 'rotated'
bias_str = 'Y'
num_realiz = 1
max_runs = 10000
elif code_name == 'rot_spiral':
codes_and_size = [
RotatedPlanarCode(*(size, size)) for size in rotsizes
]
decoder = _rotatedplanarmpsdecoder_def.RotatedPlanarMPSDecoder_def(
chi=chi_val)
layout = 'rotated'
bias_str = 'Y'
def test_rotated_planar_lattice_is_virtual_plaquette(index, expected):
lattice = RotatedPlanarCode(3, 5)
assert lattice.is_virtual_plaquette(index) == expected
np.random.seed(1234 * (run_id + 1))
def square(a):
return a**2
vsquare=np.vectorize(square)
bdry_name='rotated'
code_name = 'rotspiral'
error_probability= err_prob
perm_rates=[0,0,0,0,0,0]
from itertools import cycle
code = RotatedPlanarCode(*(code_size,code_size))
decoder = _rotatedplanarmpsdecoder_defp.RotatedPlanarMPSDecoder_defp(chi=chi_val)
layout='rotated'
bias_str='Z'
error_model = BiasedDepolarizingErrorModel(bias,bias_str)
# print run parameters
print('code:',code.label )
print('Error model:',error_model.label)
print('number of realizations:',num_realiz)
print('Decoder:',decoder.label)
print('Error probabilities:',error_probability)
print('Maximum runs:',max_runs)
results = TNDresult_random(code,decoder,error_model,max_runs,perm_rates,error_probability,code_name,layout,num_realiz)
@pytest.mark.parametrize('index, expected', [
((2, 1), True), # in-bounds x plaquette
((4, 1), True), # boundary x plaquette
((2, -1), True), # out-bounds x plaquette
((3, 1), False), # in-bounds z plaquette
((2, 2), False), # boundary z plaquette
((-1, 1), False), # out-bounds z plaquette
])
def test_rotated_planar_lattice_is_x_plaquette(index, expected):
lattice = RotatedPlanarCode(3, 5)
assert lattice.is_x_plaquette(index) == expected
@pytest.mark.parametrize('lattice, expected', [
# RotatedPlanarCode(row, cols), (max_site_x, max_site_y)
(RotatedPlanarCode(3, 3), (2, 2)),
(RotatedPlanarCode(4, 4), (3, 3)),
(RotatedPlanarCode(3, 5), (4, 2)),
(RotatedPlanarCode(5, 3), (2, 4)),
(RotatedPlanarCode(4, 6), (5, 3)),
(RotatedPlanarCode(6, 4), (3, 5)),
(RotatedPlanarCode(3, 4), (3, 2)),
(RotatedPlanarCode(4, 3), (2, 3)),
])
def test_rotated_planar_lattice_site_bounds(lattice, expected):
assert lattice.site_bounds == expected
@pytest.mark.parametrize('index, expected', [
((0, 1), True), # in-bounds left
((4, 1), True), # in-bounds right