Non-Abelian quantum holonomy mathematical geometric structure entangles photons without requiring quantum measurement
https://phys.org/news/2025-03-protocol-enables-photon-entanglement-quantum.html
"enables potentially transformative on-chip photonic quantum computers: room temperature, portable, easily integrated with existing quantum communication systems/ links... photonics-based quantum computer building using light... overcomes tendency of photons not to interact with each other, instead offering consistent, controllable, deterministic entanglement... without requiring quantum measurement"
Related: Entangled in self-discovery: quantum computers analyze their own entanglement
https://www.eurekalert.org/news-releases/1078242