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"In a larger sense, the theory suggests that the entire universe can be seen as a two-dimensional information structure "painted" on the cosmological horizon"
by DonGateley 13y ago
"In a larger sense, the theory suggests that the entire universe can be seen as a two-dimensional information structure "painted" on the cosmological horizon"
True for an anti de Sitter space (thus ADS/CFT) but not for the one we live in which is a de Sitter space and lacks the requisite boundry. I wish someone could explain the relevance of ADS/CFT to this universe.
I once had the opportunity of being in a car alone with Juan Maldacena for an hour and asked him. He pretty much shrugged (probably meaning any attempt to explain that to me, a layman physics junkie, would be futile.) He's a really, really nice and personable guy so I'm sure that if there was anything I could have understood he would have tried.
- Ygg2 13y agoThink of it this way de Sitter space is essentially analogous to living on a sphere. In that space any triangle on the sphere's surface has more than 180 degrees. http://en.wikipedia.org/wiki/Spherical_geometry http://en.wikipedia.org/wiki/Spherical_geometry Anti de Sitter space is essentially living on a boundary of a black holes like curvature. Like this one: http://en.wikipedia.org/wiki/File:HyperboloidOfOneSheet.png http://en.wikipedia.org/wiki/File:HyperboloidOfOneSheet.png In hyperbolic space any triangle on the hyperbolic surface has less than 180 degrees. A sphere has no boundary (think invisible walls in video games). You can move over it for infinite time without encountering an invisible wall that says, you can't go further. Because it closes on itself. Contrast this with hyperbolic space, which must has such boundary, because it can't close on itself without becoming some other kind of space. Note: it's an analogy, don't be too nitpicky.