Entanglement certification in bulk nonlinear crystals for degenerate and non-degenerate SPDC: spectral filter effects on transverse spatial correlations

This project is an academic reference implementation tied to a specific research paper (arXiv:2510.26416). Its primary value lies in the experimental findings and the mathematical modeling of Type-I BBO crystals for quantum imaging applications. With 0 stars and 3 forks (likely lab members) at 7 days old, it currently lacks any commercial moat or user adoption. Defensibility is low because it is a niche scientific tool; while the domain expertise is deep, the code itself is a utility for replicating the paper's results rather than a defensible software product. Frontier labs like OpenAI or Google are unlikely to enter this space as it pertains to specialized hardware-level quantum optics characterization, which is outside their current focus on LLMs and high-level quantum compute stacks. The 'displacement horizon' is marked as 'unlikely' because this is a foundational scientific study; it won't be 'displaced' by tech so much as superseded by more comprehensive physical models in future research. The risk of platform domination is non-existent as the market for SPDC filter-effect simulation is purely academic/R&D.