Comments on: Testing Gravity in Cleveland http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/ Random samplings from a universe of ideas. Mon, 09 Nov 2009 00:09:16 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Yvette http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77243 Yvette Fri, 29 May 2009 09:31:43 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77243 I'd say something about nostalgia but I'm going back to Case once I finish my trip around the world. :) Just wondering if you recall, was the comedy troop just called "IMPROV"? Those guys are extremely popular on the CWRU campus. I’d say something about nostalgia but I’m going back to Case once I finish my trip around the world. :) Just wondering if you recall, was the comedy troop just called “IMPROV”? Those guys are extremely popular on the CWRU campus.

]]> By: Mark http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77202 Mark Fri, 29 May 2009 01:26:11 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77202 In comment 7 Dmitry Podolsky does a nice job of detailing Nima's talk for those of you who'd like a description. In comment 7 Dmitry Podolsky does a nice job of detailing Nima’s talk for those of you who’d like a description.

]]> By: Workshop on tests of gravity in Case Western - day 2 and Arkani-Hamed's talk | NEQNET: Non-equilibrium Phenomena http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77173 Workshop on tests of gravity in Case Western - day 2 and Arkani-Hamed's talk | NEQNET: Non-equilibrium Phenomena Thu, 28 May 2009 20:24:44 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77173 [...] talk. Since nobody in the physics blogosphere seems to really discuss the content of his talk (see Mark Trodden’s report - he attended the workshop, too), let me proudly do it for [...] [...] talk. Since nobody in the physics blogosphere seems to really discuss the content of his talk (see Mark Trodden’s report – he attended the workshop, too), let me proudly do it for [...]

]]> By: onymous http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77166 onymous Thu, 28 May 2009 18:48:14 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77166 <i>Surely any theory that admits asymptotically AdS solutions will have a holographic description of some sort. </i> I don't see the contradiction between this and saying that modified gravity doesn't work. Can you elaborate? (If you mean that you have some effective theory in mind for modified gravity with AAdS solutions, then my guess is that (a) the theory has no UV completion and (b) it's sick in ways that can be studied in both the bulk theory and the boundary theory.) Surely any theory that admits asymptotically AdS solutions will have a holographic description of some sort.

I don’t see the contradiction between this and saying that modified gravity doesn’t work. Can you elaborate? (If you mean that you have some effective theory in mind for modified gravity with AAdS solutions, then my guess is that (a) the theory has no UV completion and (b) it’s sick in ways that can be studied in both the bulk theory and the boundary theory.)

]]> By: David Nataf http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77154 David Nataf Thu, 28 May 2009 16:16:32 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77154 That's very surprising about Arkani-Hamed, I thought he was a staunch string theorist, so I'd guess he would be all for modified gravity? That’s very surprising about Arkani-Hamed, I thought he was a staunch string theorist, so I’d guess he would be all for modified gravity?

]]> By: GR http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77153 GR Thu, 28 May 2009 16:07:03 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77153 Interestingly enough, in my time with various improv groups in school, I've noticed that science and engineering types are disproportionately represented. Even more so for physics majors. Definitely not what you'd expect... Interestingly enough, in my time with various improv groups in school, I’ve noticed that science and engineering types are disproportionately represented. Even more so for physics majors. Definitely not what you’d expect…

]]> By: Christina Viering http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77140 Christina Viering Thu, 28 May 2009 12:54:28 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77140 Very heavy stuff! Very heavy stuff!

]]> By: Jason Dick http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77132 Jason Dick Thu, 28 May 2009 07:53:26 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77132 So, was Nima's argument that we can't expect modifications to GR beyond f(R) modifications? So, was Nima’s argument that we can’t expect modifications to GR beyond f(R) modifications?

]]> By: AdSMan http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/comment-page-1/#comment-77123 AdSMan Thu, 28 May 2009 03:15:51 +0000 http://blogs.discovermagazine.com/cosmicvariance/2009/05/27/testing-gravity-in-cleveland/#comment-77123 I don't quite understand what NAH was saying. Surely any theory that admits asymptotically AdS solutions will have a holographic description of some sort. Or does he mean that there is something wrong with the boundary theory? As for a flat-space analog of AdS/CFT: good luck with that.... I don’t quite understand what NAH was saying. Surely any theory that admits asymptotically AdS solutions will have a holographic description of some sort. Or does he mean that there is something wrong with the boundary theory?

As for a flat-space analog of AdS/CFT: good luck with that….

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