303 | AMA | February 2025

12826.349 - 12848.409 Sean Carroll

And even though you think you're in the vacuum, you're still detecting particles. That's one way of thinking about various effects in quantum field theory. Anyway, the point is that you can have different global vacuum states depending on the geometry of spacetime, but locally they should look all more or less the same. The differences become subtle like if you, you know, Let's put it this way.