I'm learning more and more about Quantium Mechanics, specifically Quantum Entanglement / “spooky action at a distance”. I watched this video by Derek Muller (@veritasium) on youtube that explains spin and some other things very broadly. At around 1:52 he explains the experiment uses two particles prepared in the same way, formed spontaneously out of energy.
There's a long running forum I found on the matter, but the conversation isn't very concise: How do particles become entangled?.
I'm looking for an explanation of the physical processes that have to occur for two particles to become entangled in such a way that if one particle's spin is measured the value of it's alias's spin is the opposite.
How do particles become entangled?