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Fix exact distance calculation #25

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Merged
quantumgizmos merged 1 commit into from
Apr 27, 2026
Merged

Fix exact distance calculation #25

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4 changes: 2 additions & 2 deletions src/qec/code_constructions/css_code.py
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Original file line number Diff line number Diff line change
Expand Up @@ -351,7 +351,7 @@ def compute_exact_code_distance(
x_logical, x_stabiliser = next(x_iter)
candidate_x = x_logical + x_stabiliser
candidate_x.data %= 2
x_weight = candidate_x.getnnz()
x_weight = (candidate_x != 0).sum() #count non-duplicate non zeros
if x_weight < x_code_distance:
x_code_distance = x_weight
combinations_considered += 1
Expand All @@ -364,7 +364,7 @@ def compute_exact_code_distance(
z_logical, z_stabiliser = next(z_iter)
candidate_z = z_logical + z_stabiliser
candidate_z.data %= 2
z_weight = candidate_z.getnnz()
z_weight = (candidate_z != 0).sum()
if z_weight < z_code_distance:
z_code_distance = z_weight
combinations_considered += 1
Expand Down