Hydrogen's heavier deuterium isotope significantly improves silicon's T center performance in quantum repeaters/ networks

https://phys.org/news/2026-02-heavier-hydrogen-silicon-centers-brighter.html

"T center silicon defects emit/ interact with photons at telecommunications wavelengths... with ordinary hydrogen atoms energy leaks as heat, but deuterium 2x heavier so vibrates at much lower frequency preventing leaking as heat, forcing light release... T centers became significantly brighter/ excited-state lifetime extended >5X... silicon-based qubits then approach near-perfect quantum efficiency... scalable, integrable into existing manufacturing... quantum internet: same wavelengths used in fiber-optic cables"