The Single Quantum Field Theory

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There are states of a quantum field theory that to you and me look exactly like one particle. The single quantum field describes simultaneously the possibility of zero particles, one particle, two particles, all the way up. And then there's another set of states that have more energy that have at least twice as much energy as those first set of states. When two of these fields interact, does the wave function branch into interacted and not interacted? Almost.

Welcome to the September 2022 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patrons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!

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