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Quantum Gravity (edit)

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|image=Eric profile picture.jpg
|nameurl=https://x.com/EricRWeinstein/status/1964363983403831632
|name=Eric Weinstein
|usernameurl=https://x.com/EricRWeinstein
|username=EricRWeinstein
|content=@TimHenke9 Yet your “Physics” thesis is 153 pages.
Take care, slugger.
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|nameurl=https://x.com/quantum_geoff/status/1964229351387349491
|name=Geoff Penington
|usernameurl=https://x.com/quantum_geoff
|username=quantum_geoff
|content=Well that is one way to respond to the fact that you can’t quantise your theory of everything because it’s anomalous
|quote=
{{Tweet
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|nameurl=https://x.com/EricRWeinstein/status/1964047578074685451
|name=Eric Weinstein
|usernameurl=https://x.com/EricRWeinstein
|username=EricRWeinstein
|content=We picked up this weird Quantum Fetish in the 1980s.
CLAIM: Discoveries in Classical Field theory have been FAR more important historically for our deep understanding of the physical world than Quantum theory. As late as 1986, this wasn’t even that controversial of an observation.
Further, the theory of Geometric Quantization can be interpreted as saying that classical Hamiltonian systems are roughly *Self Quantizing*. Which is huge and rectified a huge oversight.
I am not sure why I am constantly supposed to ooh and aah about all things quantum (“It’s entangled!!!” “The cat is both dead AND alive!” “It goes through both slits!!”) while pretending that our classical field theory is just a low energy effective theory.
This should be reversed in my opinion. Perhaps we aren’t making progress following the Quantum Fetishists with their [[Quantum Gravity]] that doesn’t work.
HERETICAL CLAIM: Classical Theory is FAR more important than the failed [[Quantum Gravity]] crowd understands. We would be much further ahead if we stopped the quantum fetish. The world *IS* quantum. But it is *also+ likely classical in a way that is equally if not more profound. We should split the field into quantum supremacists and mixed Quantum / Classical people and see if the second group doesn’t outpace the fetishists within the first.
|timestamp=7:26 PM · Sep 5, 2025
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|timestamp=9:05 AM · Sep 6, 2025
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|image=TimHenke9-profile.jpg
|nameurl=https://x.com/TimHenke9/status/1964248611295793560
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content="the theory of Geometric Quantization can be interpreted as saying that classical Hamiltonian systems are roughly *Self Quantizing*"
The theory of geometric quantisation absolutely doesnt say this lol. The requirements imposed by geometric quantisation are really quite stringent
|timestamp=8:45 AM · Sep 6, 2025
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|nameurl=https://x.com/quantum_geoff/status/1964253500080038068
|name=Geoff Penington
|usernameurl=https://x.com/quantum_geoff
|username=quantum_geoff
|content=Yeah that was definitely something that could only be said by a man who knows absolutely nothing about geometric quantisation. Firstly it needs way more structure than just a Hamiltonian system. 1/
|timestamp=9:05 AM · Sep 6, 2025
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|nameurl=https://x.com/quantum_geoff/status/1964253741353254987
|name=Geoff Penington
|usernameurl=https://x.com/quantum_geoff
|username=quantum_geoff
|content=Secondly it’s only designed for finite dimensional phase spaces while all the really interesting stuff (like anomalies) only happens with infinite dimensions
|timestamp=9:06 AM · Sep 6, 2025
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|nameurl=https://x.com/TimHenke9/status/1964263046160748892
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content=That too! I was thinking of the topological requirement that the symplectic form is integral in cohomology in order for the prequantum line bundle to exist
On Piers Morgan he tried to paper over this by saying it "locally" exists but that's no help when you need global sections
|timestamp=9:28 AM · Sep 6, 2025
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|nameurl=https://x.com/quantum_geoff/status/1964260547659980974
|name=Geoff Penington
|usernameurl=https://x.com/quantum_geoff
|username=quantum_geoff
|content=Yes I realised (and that’s what I meant by you need extra structure). Locally any symplectic form is just dp_i wedge dq^i so i guess he has rediscovered that L^2(R^n) is a Hilbert space or something
|timestamp=9:33 AM · Sep 6, 2025
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|nameurl=https://x.com/TimHenke9/status/1964263046160748892
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content=Oh, I thought by "extra structure" you meant that you need the choice of polarisation, which is also a huge thing you can't just sweep under the rug
|timestamp=9:42 AM · Sep 6, 2025
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|nameurl=https://x.com/quantum_geoff/status/1964266669192188160
|name=Geoff Penington
|usernameurl=https://x.com/quantum_geoff
|username=quantum_geoff
|content=I meant both. But the line bundle is in some ways more interesting because it’s extra structure that is not guaranteed to exist (even with the freedom to rescale hbar)
|timestamp=9:57 AM · Sep 6, 2025
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Have fun. And good day, gentlemen. Keep up the high standards and good work.
Have fun. And good day, gentlemen. Keep up the high standards and good work.
|timestamp=2:56 PM · Sep 6, 2025
|timestamp=2:56 PM · Sep 6, 2025
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|nameurl=https://x.com/TimHenke9/status/1964348779814846548
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content=Buddy, we're not doing "quantum supremacy". But if you wanna quantise a classical theory you must work for it. You don't get to yell "self-quantising" and call it a day
You must check topological conditions & choose/prove independence of polarisation & the prequantum line bundle
|timestamp=3:23 PM · Sep 6, 2025
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|nameurl=https://x.com/EricRWeinstein/status/1964351563553526194
|name=Eric Weinstein
|usernameurl=https://x.com/EricRWeinstein
|username=EricRWeinstein
|content=@TimHenke9 @quantum_geoff Which is both INCREDIBLE and difficult as it stands. Yes? No? I mean I think I get this.
Like it’s almost a miracle that it works at all:
|timestamp=3:34 PM · Sep 6, 2025
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|nameurl=https://x.com/TimHenke9/status/1964348779814846548
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content=Now you're getting it! :)
And not only difficult but often simply false. Many classical phase spaces dont admit prequantum line bundles. Others don't have a unique one
And the choice of polarisation can be the difference between a finite- and infinite-dimensional Hilbert space!
|timestamp=3:43 PM · Sep 6, 2025
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{{Tweet
|image=Eric profile picture.jpg
|nameurl=https://x.com/EricRWeinstein/status/1964360623992811644
|name=Eric Weinstein
|usernameurl=https://x.com/EricRWeinstein
|username=EricRWeinstein
|content=“Buddy”
“Now you're getting it! :)”
You guys are just so full of yourselves. What are you…in your 20s? Born around AdS/CFT? Am I your problem student finally coming along to “get it”?
You think I can’t understand you! Right? Like you are my teacher or something. Adorable.
I forget what this community is like. You do realize you are still playing with toy models working a million miles away from actual laboratory physics?
Take a look out your window Tim: No quarks. No neutrinos. No generations. You are on the train to NERPH (Not Even Remotely Physics). You just don’t know it. Before long you will leave for a job so you can buy a house or retire without ever having made contact with physical reality. As a physics person. Wake up.
You’re not even in spacetime Tim. You are likely playing with Riemann surfaces. Your “Higgs Fields” are often valued in the adjoint bundles. Your metrics are often Euclidean signature. Your SUSY is likely unsupported by any LHC superpartners. Etc. Etc.
You actually think I don’t get it because if I did “get it” I would certainly agree with you.
Like I can’t read what you wrote here or I wouldn’t be saying these things:
|timestamp=4:10 PM · Sep 6, 2025
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|image=TimHenke9-profile.jpg
|nameurl=https://x.com/TimHenke9/status/1964348779814846548
|name=Tim Henke (tɪm 'ɦɛŋ.kə)
|usernameurl=https://x.com/TimHenke9
|username=TimHenke9
|content=If those two little interjections are enough to set you off like this, you really need to get your temper in check lmao
Remember, champ: brevity is the soul of wit
|timestamp=3:43 PM · Sep 6, 2025
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|timestamp=4:24 PM · Sep 6, 2025
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