254K views · Sep 8, 2022 · 49:43 · 1 HN recommender · 3 mentions · discussed 2022–2025
Theoretical physicist Nima Arkani-Hamed gives a public talk on why spacetime may not be fundamental and what might replace it, including newer approaches to scattering amplitudes.
Why Hacker News points people here: Praised as a jargon-light talk on advanced physics that HN cites when arguing spacetime is not fundamental.
“Highly recommended for anyone interested in this topic.”HN comment, 2022
“Highly recommended for anyone interested in this topic.”
Jargon-free talk on advanced physics and the end of spacetime
I couple of weeks ago, I watched a really good talk by Nima Arkani-Hamed on the same topic: this video that I discovered via link I found Nima's lecture to be a masterclass on how to explain very advanced physics topics without using unnecessary jargon, or math. Highly recommended for anyone interested in this topic.
“My hope is that an alternative approach can be found that avoids these complicated calculations”
Researchers pursuing alternatives to complicated Feynman diagram calculations
The paper is written in scathing tones, by page 11 I was laughing at each new report of QED's 'perfect' agreement with whatever was the latest experimental result for the electron's anomalous magnetic moment although as it continued as far as page 14, it became sobering. However, the recent discrepancies are way down in the decimal points of the result now; when these calculations require 1000s of complicated Feynman diagrams and pages and pages of calculation, errors seem inevitable. My hope is that an alternative approach can be found that avoids these complicated calculations and in fact, researchers already seem to be working on this [1]. [1] Nima Arkani-Hamed - The End of Spacetime (Sep 2022) this video
“Umm SpaceTime is likely NOT to be fundamental or continuous”
Supports claim that spacetime is not fundamental
Umm SpaceTime is likely NOT to be fundamental or continuous this video Also Bells Therom implies no locality or non realism which to me furthers the nail on the coffin of spacetime
