ExpXuFlaws

Tier B: Xu et al. 2015, a measured source flaw and its key rate

4/4 passed in 2ms

Test	What it does	Result
test_flawed_beats_coin	The quantum-coin bound reaches 26.9 km against the loss-tolerant 89.5 km, 3.3 times, beside their Fig. 3 caption's finite-key 9 and 60 km.	✅ pass
test_flawed_bounded	The asymptotic loss-tolerant phase error sits under Table III's finite-key upper bound at 5, 20 and 50 km, and the bit error under their e_z by less than their 2.35% misalignment.	✅ pass
test_flawed_costs_little	The measured 0.134 rad flaw costs 2.0% of loss-tolerant reach, 91.3 to 89.5 km, against their "almost the same as the case without source flaws".	✅ pass
test_flawed_needs_tilt	At tilt = 0 flaw_phase returns the same value to 1e-15 for delta = 0, 0.134 and 0.3; at tilt = -delta it rises, by over 1.5 times at 0.134.	✅ pass