Thread

1. glenstein · 1790352638 · focus · HN ↗

   As a non expert who's just curious about science but also tries to talk like a normal person, from what I can tell holography really seems like it's now the leading candidate to be the next big conceptual revolution in physics.

   There's not necessarily any breakthrough right around the corner and we shouldn't rush to coronation preemptively, but there's a lot of physics "voting with their feet" for holography as the article says, and I think it's officially time to start getting hyped. It could have sanity-restoring answers to questions of quantum weirdness, albeit at the rather expensive cost of giving up even more on our day to day intuitions about space and time in favor of an apparently informational substrate.

   String theory had a generation of great science communicators writing its books and singing its praises, but holography doesn't yet have equivalent public champions, and I hope that's something that changes sooner than later.

   1. ck2 · 1790354778 · focus · HN ↗

      isn't holographic universe a similar concept to string theory in that they both propose higher dimensions projecting into lower dimensions

      string theory, 11 dimensions, is bonkers though, it's what happens when people are too smart for their own good imho lol

      1. immmmmm · 1790375819 · focus · HN ↗

         No string theory (10d) or m theory (11d) map to lower dimensions (eg 4d) via (generalisation of) Kaluza Klein compactification. Vector boson (eg maxwell or Yang mills) are internal degree la of freedom-> 6/7d graviton becomes a photon/ gluon.

         There’s holography in string theory: AdS/CFT but this rather maps 4d super Yang mills (on the boundary of AdS5) in an AdS5xS5 background: which is one holography correspondence we know works.

         Holography is much more common, but we only really understand it on hyperbolic spaces.

         Also since it has a theory at strong coupling on one side we cannot really do calculation on that side and verify it.

         You can use it tho to make calculations.

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