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How do you differentiate between fields from a new theory or new fundamental forces? For example. If QM is replaced with a new theory, would the extra dynamics and degrees of freedoms be new forces of nature or can they be non-force or field related, can you give some examples to differentiate? For example. The Higgs field is not a new fundamental force.. is it because Higgs didn't come from some kind of gauge symmetry? How about the new theory that might someday replace quantum mechanics.. what other Higgs like field do we have that are different from the 4 fundamental forces yet is not a new force/field of nature?

Reading the following led me to wonder:

"I think what will happen is eventually quantum mechanics will need to be replaced, and the new theory might ascribe more obviously to one of the current interpretations, even if it also introduces some new ones. If so, then it will be useful to be versed in all the interpretations, because we never know which one will be the most conducive to the development of the new theory. We saw this with classical mechanics, where the Hamiltonian formulation is more conducive to quantum mechanics and the Lagrangian formulation is more conducive to quantum field theory. Ironically, often overlooked is the fact that the interpretation of the existence of "forces" is not particularly conducive to either! Yet we prefer that interpretation so much that we still teach it in high schools, which goes to show you that perhaps we should not be interpreting our interpretations as "what is really happening" anyway!"

Reference https://www.physicsforums.com/threads/entanglement-what-is-it.927145/page-4

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# B New Theory vs New Force/Field of nature

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