Possible Vulnerabilities of PostQuantum Cryptography to Attacks with Physics Beyond the Standard Model

What if our newest "quantum-resistant" cryptographic standards are vulnerable to neglected physics at the intersection of quantum and classical approaches and physics beyond the standard model? I want to walk you through something I've been thinking about since I was a student of Fields Medalist Richard Borcherds at UC Berkeley. Borcherds specializes in lattice mathematics and string theory, and…