You're in an IT forum and can't imagine implementations of both the smallest and largest scales? ICs are built at nanoscale and have to deal with quantum effects. PNT systems are so large that they have to deal with the speed of light and relativistic effects.

Many things humanity builds are on the scale of colliders.

> The problem is that fundamental physics

I didn't know there was a problem. It seems like one of humanity's greatest successes.