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General Relativity: Difference between revisions
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|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1834702103211917754 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=For some reasons that have never been explained or justified leaders in physics started making the claim that [[General Relativity|GR]] *was* also a gauge theory. This was done by claiming that general coordinate invariance in the form of the diffeomorphism group is a kind of Gauge Transformation. Which it clearly is not. | |||
This is absurd. Gauge transformations move the fibers and are defined not to move space time where as diffeomorphisms move space time directly. | |||
So: why claim that GR is a kind of gauge theory? The only payoff I see is that this allows us to pretend that the [[Standard Model|SM]] vs [[General Relativity|GR]] incompatibility is classical vs quantum where it is staring us in the face that it is instead contraction-based ([[General Relativity|GR]]) vs Gauge Transformed ([[Standard Model|SM]]). | |||
The only reason this is at all controversial is that the people saying it were thought to be the leaders 40 years ago. | |||
That didn’t work out. We have 40 years lost as a result. | |||
But the truth is anyone can see the incompatibility between gravity and gauge theory if they are not being told that gravity is a special kind of [[Gauge Theory|gauge theory]]. Which it absolutely is not as formulated by Grossman, Einstein and Hilbert. | |||
[[Morals|Moral]]: The problem holding us back from a Theory of everything is **Classical**, and not Quantum. The quantum comes as desert after classical compatibility. It’s not the main issue. A red hearing that throws us off following the scent. It’s a distraction that should have fooled almost no one who was thinking for his or her self. | |||
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{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1834698277356527999 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=This is what is blocking progress in my opinion for physics to go beyond [[Albert Einstein|Einstein]] and [[General Relativity]]. | |||
40 years ago, the leaders of physics started claiming that gravity had to be quantized to be compatible with the [[Standard Model]]. | |||
But the incompatibility is *not* Quantum vs Classical field theory. The *classical* field theory of the [[Standard Model]] is already not compatible with classical [[General Relativity]]. | |||
[[General Relativity]], at least as it is now, simply cannot be gauged so as to make it a true gauge theory, because Gauge transformation does *not* commute with the Ricci Contractions used in the field equations, and within the Einstein Hilbert action. | |||
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{{Tweet | |||
|image=postquantum-profile-CoJxMwrT.jpg | |||
|nameurl=https://x.com/postquantum/status/1834184677860491584 | |||
|name=Jonathan Oppenheim | |||
|usernameurl=https://x.com/postquantum | |||
|username=postquantum | |||
|content=I wish I deserved the heretic moniker, but isn’t asking whether spacetime is quantum or classical just common sense? After all, general relativity (GR) - our theory of gravity and spacetime - is special. It isn’t a gauge theory, and gravity isn’t a force. 1/ | |||
|timestamp=10:57 AM · Sep 12, 2024 | |||
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|timestamp=8:58 PM · Sep 13, 2024 | |||
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|timestamp=9:14 PM · Sep 13, 2024 | |||
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=== 2025 === | === 2025 === | ||