To OP, if we assume plank scale to be the end, that has no relevance to whether we look for QG or not. There is something interesting that happens at smaller scales, the smoothness of space (as in GR) disappears and its just ripples, well in some sense. At that scale physics is a little...
You remember my name, sweet! In any case, I remember reading something related. A paper showed that the idea of quantum foam having a widely different physics was actually wrong and in that paper the authors showed that the laws remain the same through plank scales. The 126 GeV prediction is...
A very interesting prediction, I do have a question though, marcus can you elaborate a bit on what you meant by: "Their prediction of Higgs mass came in the same box with one that nature had no new physics between here and the Planck scale. " Does that imply in some sense that as we go smaller...
Oracles are abstract constructs generally computational devices that we use to prove conjectures and so on, for instance you can give infinite computational resources to one oracle and then limited to another one and simulate the Merlin-Arthur games. They are not physical devices, the reason...
You beat me to it :) i was gonna make a post about the paper in the morning. Now what'd be really interesting is to see how they generalize this work done to a string theory in the bulk instead of Vasiliev gravity.
One has to admit that a lot of good physics has come out of the accelerators that we build. Higgs was indeed amongst other things the primary objective, SUSY is also not looking too well at Lepton-Photon 2011. Now as it has been stated before, people never see paying money to do physics...
We don't really know but there are speculations about it. One thing I do want to say is that when we are talking about any such cases, there are many different proposals as to what happens to "stuff" as it falls into a black-hole, for instance the holographic principal states that it gets...
Fyzix, quantum effects is a broad term, if we focus only on wavefunctional collapse, i don't think dS/CFT answers that, the problem being that from what I understand, it establishes a link between string/M/F theory in the bulk and a field theory on the boundary. My ideas just deal with a...
Fyzix, i am not exactly sure if it is or not, i simply wrote down what a "mainstream" theorist might say, my idea was about a different topic (dS/CFT), not wavefunctional collapse :)
Fyzix, a complete theory of quantum gravity will provide us insights into every field imaginable :) so yes it will lead to some resolution of the measurement problem, but only time will tell. For a long time, if I am correct, decoherence has been adapted as the "modern" view of wave-function...
Schreiber, we struggle to formulate a proper theory of quantum gravity because we don't yet understand a lot of the concepts, for instance, the concept of space has been very well developed, we even speculate that space itself may be emergent of some deeper phenomenon, but what about time...
A lot of people seem to ask this question, Penrose answered this in a very elegant way, so let's assume we have 3 worlds (http://cambridgeforecast.files.wordpress.com/2007/05/worldspenrose.gif" [Broken]) This is only a construction to help you understand why string theorist do what they do. So...
Schreiber, from what I understand, holographic screen are present in the bulk, so we have the bulk theory dual to the screen, not the CFT on the boundary.
Fyzix: this thread isn't dead yet, we are simply waiting, at Strings 2011, Herman et. al announced that they had worked out a complete example of dS/CFT and the paper will be out later this month. Once that's in, then we can do a lot more instead of making guesses as to what really happens...
Often times these bumps are noise in the background, but we have been seeing these news for a while now so maybe we are close to something. Otherwise if it is as Nelson states, then we'll never be able to find the Higgs.
Thanks for the link to the talk, I was looking around for the talk on Simulating the universe as a quantum computer when i found the talks from the Holographic Cosmology 2.0. There was some talk on the Denef paper as well. Anyways the idea of using a screen is very interesting, it reminds me of...
Just an update, I've been working on a related problem in the meantime however, today two very interesting papers came up, I am not sure if anyone mentioned those already or not.
1. dS/CFT Duality on the Brane with a Topological Twist: A C Petkou, G Siopsis (2001)
This in some sense goes...
thanks for the reply mitchell, in that last post I was referring to: An AdS/dS duality for a scalar particle. I do understand to some extent that reading that paper won't provide the full correspondence that we need, the ideas presented there seemed interesting though. But it is as you say, this...
I'm currently reading that paper and it is an impressive result that they are able to show how a massless scalar field in EAdS space is dual to massive scalars in dS space. But see that also brings up another concern I have, the scalar field phi that we have been discussing in various papers so...
thanks again for the clarification mitchell, so far you have presented a lot of information, and i want to make this post to collect the main ideas since its spread across 4 pages, then we can carry on the discussion. Please PM me if you want changes in this post, that way we can keep one post...
Currently reading through the new twist paper, from a preliminary analysis these guys are aiming to reformulate the ds/CFT correspondence by replacing the classical isometry group with this new q version, and introduce the principal series representation. Also one interesting line I found was...
I see, well since the dS/CFT paper is readily available, I'm gonna start with that and the correlation functions. By the time I finish that, the twistors and de Sitter holography talk might be around.
thanks for the links qsa, currently i've given up on the quantum graphity approach to this problem and i'm studying that ds/CFT paper. I'll look at the first paper more closely, that one appears to have something nice, atleast it addresses some of the things i'm interested in.
edit: that...
So then studying the ds/CFT paper is probably a good idea, I think I will be doing that for the next few days. Originally I had in mind to go study twister theory and its implication that you provided but now in the light of these new developments, mitchell is it a good idea to spend time on...
Actually I think I can somewhat answer my question, please correct me where needed, ds/CFT correspondence implies the duality between the bulk and boundary, the mapping will show, when two points, that are far away interact, that interaction (through the use of the constructed mapping) is...
mitchell, thanks for that post, I haven't studied the local nature of twistors for the boundary before so I'll look around, study and then come back to address the concerns you mentioned, and it may be as you said, the boundary remains quantum.
Another observation, this one however may not...