Timeline for What is dimension? What is the size of dimension?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Jul 15, 2020 at 9:35 | vote | accept | Ashwin Balaji | ||
| Jun 26, 2019 at 16:27 | comment | added | G. Smith | Eliminating divergences from quantum gravity. Also, string theory is also about branes of various dimensions, not just strings. But I’m sure Wakabaloola can give you a better answer than I can. | |
| Jun 26, 2019 at 16:26 | comment | added | safesphere | @Wakabaloola What is the reasoning behind particles being specifically strings out of a choice of all kinds of objects? What justifies focusing the research investment only on strings? | |
| Jun 26, 2019 at 4:34 | comment | added | G. Smith | @Wakabaloola Thanks for clarifying the situation in string theory. | |
| Jun 26, 2019 at 4:31 | comment | added | Wakabaloola | Your last paragraph, e.g., we could live on a D3 brane where the extra dimensions are in the bulk and arbitrarily large. The question is specifically about the 10+1 dimensions in string theory (not Kaluza-Klein theory), and in string theory the answer (as I mentioned above) is more involved. | |
| Jun 26, 2019 at 0:19 | comment | added | G. Smith | I didn’t mention string theory. The OP did, but his question was not specifically about dimensions in string theory. What parts of my answer do you think are “partially correct”? | |
| Jun 25, 2019 at 18:23 | comment | added | Wakabaloola | for almost 40 yrs it’s been known that such an answer is only partially correct. the extra dimensions in string theory need not have any geometrical interpretation whatsoever. all that’s required is that the total central charge vanishes and that there are at least one space and one time dimension. it’s also possible that even these latter restrictions can be relaxed. in popular accounts string theorists simplify things because they couldn’t be bothered to get into details .. at least that’s my understanding. | |
| Jun 25, 2019 at 16:35 | history | edited | G. Smith | CC BY-SA 4.0 |
added 73 characters in body
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| Jun 25, 2019 at 16:28 | history | answered | G. Smith | CC BY-SA 4.0 |