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I disagree that we don't need to unify gravity and the other 3 forces under one model. We need to unify them because there is obviously a missing link between
by axilmar 6y ago
I disagree that we don't need to unify gravity and the other 3 forces under one model.
We need to unify them because there is obviously a missing link between the two theories (QM and GR), since spacetime is one and the same and there are properties defined in one theory that clearly affect the other one (but we don't know them yet).
- deleted 6y ago[deleted]
- BoiledCabbage 6y agoI believe you are being imprecise with your terms. Understanding how gravity applies on a quantum level is a theory of "quantum gravity". That is a very different concept than a "unified" theory. Your post uses appears to use the concepts interchangeably, although OP took care to show they are different.
- empath75 6y agoWhen scientists talk about unification, they're talking about the idea that all the forces are fundamentally the _same force_ at high enough energy (or early enough times after the big bang).. They've only thus far been successful at unifying the electromagnetic and weak forces.
- andrewla 6y agoAnother thing to note here is that the quantum theories are completely compatible with Special Relativity. That is, in non-curved spacetime Quantum Field Theory makes all the same predictions as special relativity does, plus all the quantum weirdness.