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Seed for the T2star test #69

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Merged
merged 2 commits into from
May 31, 2021
Merged

Seed for the T2star test #69

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973e655
* Added a seed for the T2Star experiment.
eggerdj May 31, 2021
c63cc41
* Switched to np.random.default_rng(0).
eggerdj May 31, 2021
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8 changes: 3 additions & 5 deletions test/test_t2star.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,10 +22,6 @@
from qiskit_experiments.characterization import T2StarExperiment


# Fix seed for simulations
SEED = 9000


class T2starBackend(BaseBackend):
"""
A simple and primitive backend, to be run by the T2Star tests
Expand Down Expand Up @@ -63,6 +59,7 @@ def __init__(
self._readout0to1 = readout0to1
self._readout1to0 = readout1to0
self._dt_factor = dt_factor
self._rng = np.random.default_rng(0)
super().__init__(configuration)

# pylint: disable = arguments-differ
Expand Down Expand Up @@ -115,7 +112,7 @@ def run(self, qobj):

if op.name == "measure":
# we measure in |+> basis which is the same as measuring |0>
meas_res = np.random.binomial(
meas_res = self._rng.binomial(
1,
(1 - prob_plus[qubit]) * (1 - ro10[qubit])
+ prob_plus[qubit] * ro01[qubit],
Expand Down Expand Up @@ -149,6 +146,7 @@ def test_t2star_run_end2end(self):
Run the T2 backend on all possible units
"""
# For some reason, 'ps' was not precise enough - need to check this

for unit in ["s", "ms", "us", "ns", "dt"]:
if unit in ("s", "dt"):
dt_factor = 1
Expand Down