ExpLvovskyFock

Tier B: Lvovsky et al. 2001, the measured single-photon Wigner dip

5/5 passed in 98ms

Test	What it does	Result
test_fock_budget	Their four measured efficiency factors multiply to 0.5772, matching the $(57\pm 2)$% upper limit they print and above their measured 55.3%.	✅ pass
test_fock_model	qkd's pure-loss channel on $|1⟩$ reproduces their Eq. (5) populations at their ${\rho }_{11}$, and at $\eta =0$ their vacuum control.	✅ pass
test_fock_origin	Their quoted $W(0,0)=-0.067\pm 0.016$ recomputes from ${\rho }_{11}$ through Eq. (5) at -0.0675, while the 1/pi reading of their Fig. 1 operator definition misses by 2.09 error bars.	✅ pass
test_fock_three_ways	Their marginal fit, pattern-function sampling and Abel-reconstructed $W(0,0)=-0.062$ inverted through qkd give three $\eta$ spread by 0.78%, inside their $\pm 0.013$ on ${\rho }_{11}$.	✅ pass
test_fock_threshold	W(0,0) crosses zero at exactly $\eta =0.5$, their Fig. 3 caption's $\eta >0.5$ for negativity.	✅ pass