In at least one of the universes the house will have a chimney

Hopefully all the Christmas decorations don't cause any quantum entanglement as he rushes around.

Google map is late to the game. NORAD has radars and has been doing it for much longer.

Due to the uncertainty principle, they can know where he's going or where he is, but not both at the same time.

The problem with Santa Tracker is that he only visits like 20 cities accross the globe.
I live in bumfuck nowhere and I still get presents. That's how I know that Google is lying.

I subscribe to the multi Santa theory

As an expert scientician with a degree in science, I can tell you in my educated opinion that Santa's Quantum Superposition Theory is the best explanation for how I got a Zartan action figure in 1985 without ever telling my mom and dad I wanted one.

Wave function collapse is a totally real thing, yeah.

Most quantum stuff doesn't apply to our every day, macro lives.

Except seeing Santa. If you see him, run.

Don't stop running.

He's faster than a deer, and you need a head start. ;)

To a degree, yes. As was mentioned elsewhere there is a thing called Wave Function Collapse, which occurs when a measurement is taken of a quantum system and forces the system from superposition (multiple states at once) into a single state. A measurement could be seeing it, scanning it, bumping into it, etc (not human conscious observation, that's an old and weird interpretation and not relevant nowadays).

Before (and after as well) you actually collapse the wave function you can perform meaningful math using the quantum particles. The one way I'm familiar with is for computer calculations, which is what quantum computers are aiming for. This is basically done by canceling out certain possibilities to only allow the wave function to collapse into ways that give meaningful mathematic results.

As such, this is barely relatable to a quantum Santa which uses this nature to perform meaningful present sharing actions simultaneously using quantum superposition of a quantum system that is spread out over a very large area. Of course, basic quantum mechanics becomes statistically the same as normal physics (i.e. 10 quadrillion particles average out to one normal human), so Santa would need to be a reality bender to allow for such small chances to occur to allow a human sized being to affect a huge area... but whatever.

Yes, but no.

A quantum Santa could deliver presents to every house simultaneously if nothing observed his passage. On the other hand, at some point the wave function will collapse, like say when people check what presents are under the tree. When the wave function collapses, the probabilities all go away and there's a single answer, so he could deliver presents to one and only one house.

It is santa. You think my own parents would just lie to me for over 30 years!? To hand the credit to someone imaginary? Doesn't make a shred of sense.