Timeline for How can contracting dimensions lead to cosmological inflation?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 24, 2013 at 20:09 | history | tweeted | twitter.com/#!/StackPhysics/status/349257967826255874 | ||
| Jun 12, 2013 at 23:17 | comment | added | Chay Paterson | OK: the full D+1 dimensional spacetime doesn't have a vacuum energy. | |
| Jun 12, 2013 at 21:55 | comment | added | Dilaton | @ChayPaterson this is about the full D+1 dimensional spacetime, even though the metric can be partitioned into the expanding and contracting dimensions, they are not "warped" or something (if I rememeber correctly what "wharped" means). | |
| Jun 12, 2013 at 21:52 | answer | added | user4552 | timeline score: 3 | |
| Jun 12, 2013 at 21:45 | comment | added | Chay Paterson | Oh, ok. Well, my thinking was that the cosmological constant has a different meaning depending on if you are looking at just the 3+1 dimensional slice of the spacetime or the full D+1 dimensional spacetime: on the 3+1 dimensional slice, it might still be interpretable as the potential energy of a scalar field, but I think that will depend on whether or not you can separate out the dynamics of the compact dimensions. (Disclaimer: I'm not an expert) | |
| Jun 12, 2013 at 21:32 | comment | added | Dilaton | @ChayPaterson about that there is unfortunately no information, I rather thought they should be compact ? | |
| Jun 12, 2013 at 21:28 | comment | added | Chay Paterson | Sure. Do we know if the contracting dimensions are compact or noncompact? | |
| Jun 12, 2013 at 21:28 | history | edited | Dilaton | CC BY-SA 3.0 |
added 15 characters in body
|
| Jun 12, 2013 at 21:26 | comment | added | Dilaton | @ChayPaterson there are for example 3 expanding spatial dimensions and $n>1$ contracting dimensions. | |
| Jun 12, 2013 at 21:22 | comment | added | Chay Paterson | Which dimensions have negative $p_j$? Knowing a little bit about the global topology might help with the vacuum energy question. | |
| Jun 12, 2013 at 20:59 | history | asked | Dilaton | CC BY-SA 3.0 |