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## Summary:

- I read something confusing about QFT rendering the various QM interpretations obsolete. It sounded weird and suspicious to me but I don't know anything about QFT so I don't really know. I'd appreciate it if someone could explain the connection between QM foundations and QFT.

## Main Question or Discussion Point

Hey, applied maths and physics student here. I started wondering recently what the meaning of measurement was in quantum mechanics, and I remembered that I had once heard of the bohmian interpretation which challenged the impression I had so far (which was that hidden variables had been "refuted" or something) so I started researching the subject of foundations. I read some preliminary stuff and general overviews, and I'm also reading Bell's collected papers now, which are really interesting and helpful.

However, as I was reading various stuff online I saw some people say stuff like "it's not certain QFT needs an interpretation and it makes QM interpretations obsolete" and things like that. Now it definitely seemed really weird to me because I thought, OK, so QFT exists for all this time, and yet all these people kept looking into the various interpretations, would they do that if their study was made pointless by QFT? Then again, I started thinking, if QFT is indeed more foundational than QM, shouldn't the discussion be at least modified by its existence? I really don't know anything about QFT beyond the fact that it attempts to merge together QM and relativity, and that it lead to the development of the standard model, and it's gonna be a while before I know enough about it, so I'd really appreciate it if someone knowledgeable on the subject could give a general overview of whether that's true and what the connection between foundations of QM and QFT is.

However, as I was reading various stuff online I saw some people say stuff like "it's not certain QFT needs an interpretation and it makes QM interpretations obsolete" and things like that. Now it definitely seemed really weird to me because I thought, OK, so QFT exists for all this time, and yet all these people kept looking into the various interpretations, would they do that if their study was made pointless by QFT? Then again, I started thinking, if QFT is indeed more foundational than QM, shouldn't the discussion be at least modified by its existence? I really don't know anything about QFT beyond the fact that it attempts to merge together QM and relativity, and that it lead to the development of the standard model, and it's gonna be a while before I know enough about it, so I'd really appreciate it if someone knowledgeable on the subject could give a general overview of whether that's true and what the connection between foundations of QM and QFT is.