B92Tolerance

The shared rate equation and the bit error rate it tolerates

4/4 passed in 380ms

Test	What it does	Result
test_rate_form	The rate is p_fil*(1 - h2(e_ph) - f_ec*h2(e_bit)) clamped at zero, with f_ec = 1 the published form at the Shannon limit.	✅ pass
test_reconciliation	Charging error correction above the Shannon limit lowers the tolerable depolarising rate, so the published thresholds are the f_ec = 1 column.	✅ pass
test_shor_preskill	At equal bit and phase error rates and Shannon-limit reconciliation the tolerable error is the Shor-Preskill 11.00%.	✅ pass
test_tolerance_falls	The tolerable bit error rate falls as the phase bound rises and is the root of 1 - h2(e_ph) - f_ec*h2(e) = 0.	✅ pass