Fig. 1: λ*2 range for ((6, 2, 3)) code.
From: Characterizing quantum codes via the coefficients in Knill-Laflamme conditions
Penalty factor is chosen as μ = 1. Clear boundaries can be found on the edges of region λ*2 ∈ [0.6, 1.0]. Inside the region, the loss function \({\mathcal{L}}\left(\theta ;\mu ,{\lambda }^{* }\right)\) is below 10−14.
