Chicken thinking: “Someone please explain this guy how we solve the Schroëdinger equation”
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corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish1·2 months agoJust came across this beautiful video of Richard Feynman.
corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish2·3 months agoThat’s not how physics works. If you are really interested in such issues read a book on foundations of physics or history of physics to see how physicists arrived at the most famous equations (Einstein,Dirac, Schroedinger or Newton), they are basically “bets” guided by physical and mathematical assumptions, but that is far from being “proved” or “derived”, there are no rigorous proofs or derivations involved. The uncertainty remains until an experiment or observation confirms it or rejects it. There’s no such a thing as “proving” a physical theory, for the simple reason that any physical theory works in a limited regime or range of validity. Newtonian gravitation and General Relativity are both valid and succesfull theories within their range of validity, but they contradict each other mathematically, in one theory gravity is a scalar field and in the other is a tensor field, so you could use the mathematics of one theory to refute the other, so it makes no sense the concept of proving a physical theory mathematically. You only try to axiomize a theory once is well established, but it’s irrelevant concerning its validity.
corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish3·3 months ago“The bonus of string theory is that it has the tenets of a unified theory of all interactions, electro-magnetism, weak and strong interactions, and gravitation” https://arxiv.org/pdf/0809.1036
corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish1·3 months agoYou have no idea what you are talking about. You can’t prove mathematically Einstein’s equations. No fundamental equations in physics were proved mathematically.
corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish6·3 months agoI am a physicist. String theory already unified QFT and GR and that doesn’t mean it’s a verified physical theory, you need to validate it through experiment. It’s physics 101. Just watch some Sabine H. videos to see how she speaks about string theory being a failure besides being mathematically consistent.
corvus@lemmy.mlto science@lemmy.world•New quantum theory of gravity brings long-sought 'theory of everything' a crucial step closerEnglish5·3 months agoAlthough the theory is promising, the duo point out that they have not yet completed its proof
Physics is not math, you can’t “prove” a physical theory. You make predictions and through experiment or observation Nature has the last word.
corvus@lemmy.mlto science@lemmy.world•Scientists Propose We Live in a Slowly Rotating Universe That Completes One Rotation Every 500 Billion YearsEnglish5·3 months agoA center in two dimensions, in three dimensions an axis, in more dimensions…
I would say most funny… but the worst because you have to read the whole paper to know what it is about.
When a physicist want to impress a mathematician he explains how he tames infinities with renormalization.