tag:blogger.com,1999:blog-4212234230338648875.post4092492382388494601..comments2024-03-27T20:43:05.862-07:00Comments on The Eternal Universe: Just a little updateJoseph Smidthttp://www.blogger.com/profile/02583891162785742138noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4212234230338648875.post-49574816932334115872011-08-23T16:22:58.089-07:002011-08-23T16:22:58.089-07:00Nick - when are brains have evolved to visualize h...Nick - when are brains have evolved to visualize higher dimensions, then black string will be quite obvious. ;) <br /><br />Joe - In free fermionic heterotic strings we tend to compactify on tori, so it's nothing too fancy. There are hopes to connect free fermions with orbifolds since free fermion theories exist at special points on orbifold, I think. So that may yield some useful results. Anyway, I am pretty far from calculating the hierarchies but I will keep you all in the 'loop' once we get that problem 'tied down'. (Sorry, I had to add the usual awful 'string' jokes.) <br /><br />Clark - Unfortunately, my plans to go to the next few string pheno conferences have fallen through so I can't respond really accurately at all. Sorry. Though, I can say that string folks tend to be pretty resourceful at getting around problems like 'reality'. haha. Much of the string theory that I am exposed to glamorizes how BIG the string landscape could be and when you have practically infinite numbers of models to play with (10^500) then you start thinking that there's room enough for everyone to work. I will keep my ears open for any good string 'smack-talk'. Jared Greenwaldnoreply@blogger.comtag:blogger.com,1999:blog-4212234230338648875.post-67075406777311421892011-08-22T11:59:39.852-07:002011-08-22T11:59:39.852-07:00Jared, out of curiosity how do you see moral in th...Jared, out of curiosity how do you see moral in the string community at the moment? I've been hearing a lot of negative vibes due to some of the anti-string backlash (Woit, Smolin, etc.) as well as the lack of some expected results at the LHC such as at minimum supersymmetry confirmation. I tend to think all this gets pretty wrapped up in hyperbole so I'd be interested in hearing something from a grad student on the ground.Clark Goblehttp://twitter.com/ClarkGoblenoreply@blogger.comtag:blogger.com,1999:blog-4212234230338648875.post-85001849422728282672011-08-21T07:44:09.452-07:002011-08-21T07:44:09.452-07:00Jared, it is good to hear from you. And I'm g...Jared, it is good to hear from you. And I'm glad to hear you are doing some work with Horava-Lifshitz gravity.<br /><br />I have some questions about your C++ code: You said it is calculating mass hierarchies and vevs etc... Is it making these calculations based on the manifold you are compactifying on like K3 or G2 and or doing something more general depending on the Hodge structure of the space? And does it do different types of supersymmetry breaking? Or is it solving the low-energy beta equations for maintaining Weyl invariance or something? (Or something completely different?)<br /><br />I am just interested is what your code is actually doing since there is a lot involved getting a real mass hierarchy we would see in 4D low energy approximation starting from a 10D theory so feel free to write a post about it. :)Joseph Smidthttp://www.theeternaluniverse.com/noreply@blogger.comtag:blogger.com,1999:blog-4212234230338648875.post-1775469371661849482011-08-21T06:12:28.954-07:002011-08-21T06:12:28.954-07:00Jared, it's great to hear from you. Sounds li...Jared, it's great to hear from you. Sounds like you're doing a lot of fancy math, but what I really want to know if what a D1-D5 black hole looks like.Nick Nelsonhttp://profiles.google.com/nick.j.nelsonnoreply@blogger.com