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Gravity seems holographic. What does that mean for reality?

300 points · 234 comments · ibobev

  1. qnleigh · · focus · HN ↗
    Susskind's original paper is shockingly readable, at least the first section. It doesn't use a lot of fancy math or derivations to justify holography. Mostly it uses basic concepts from undergraduate physics to show how the idea of holography is consistent and makes sense, despite it seeming incredibly counterintuitive at first glance.

    For instance, figure 3 shows how you can't hide a black hole behind another black hole, which has implications for how a 3D universe can be completely encoded in a 2D region.

    <a href="https:&#x2F;&#x2F;arxiv.org&#x2F;html&#x2F;hep-th&#x2F;9409089v2" rel="nofollow">https:&#x2F;&#x2F;arxiv.org&#x2F;html&#x2F;hep-th&#x2F;9409089v2

    1. westurner · · focus · HN ↗
      &quot;The World as a Hologram&quot; (1994) <a href="https:&#x2F;&#x2F;arxiv.org&#x2F;html&#x2F;hep-th&#x2F;9409089v2" rel="nofollow">https:&#x2F;&#x2F;arxiv.org&#x2F;html&#x2F;hep-th&#x2F;9409089v2 .. citations: <a href="https:&#x2F;&#x2F;scholar.google.com&#x2F;scholar?cites=12883331061830328784&amp;as_sdt=5,43&amp;sciodt=0,43&amp;hl=en" rel="nofollow">https:&#x2F;&#x2F;scholar.google.com&#x2F;scholar?cites=1288333106183032878...

      But can there be holograms within the outer hologram?

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