Timeline for How to make a string theory without gravity?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 13, 2023 at 19:15 | history | edited | Rexcirus |
edited tags
|
|
| Mar 16, 2015 at 21:56 | history | edited | Qmechanic♦ | CC BY-SA 3.0 |
added 48 characters in body; edited title
|
| Mar 16, 2015 at 21:47 | answer | added | Rexcirus | timeline score: 2 | |
| Mar 16, 2015 at 19:00 | comment | added | Jim | @Mouse.The.Lucky.Dog describing the standard model and explaining particles and excitations is the core purpose of string theory. Laying foundations of quantum gravity is an attractive and motivating bonus. By analogy, the core purpose of an electric car is to get you from A to B. That it is eco-friendly is an attractive and motivating bonus. String theory may fill its purpose with out gravity just like an electric car charged by a gas generator. But in both cases you say "why would you want to do that?" | |
| Mar 16, 2015 at 18:53 | comment | added | Mouse.The.Lucky.Dog | (cont) The analogy that would be more apt is to take a hybrid and drain the gasoline to see how the electrically driven part works. | |
| Mar 16, 2015 at 18:52 | comment | added | Mouse.The.Lucky.Dog | @Jimnosperm Your analogy is incorrect. For your analogy to be accurate, we would have to remove all particles/excitations. Which of course would leave virtually nothing. Mostly the theories vacuum. Hmmm. (cont. ) | |
| Mar 16, 2015 at 14:44 | comment | added | ACuriousMind♦ | The general string theory contains the generic possibility of gravitons. You will always either define a different theory or go to particular model when you want no gravitons. It's the same as demanding that a generic gauge theory have only vanishing field strength, or that a generic QFT be renormalizable - you are restricting to particular models. | |
| Mar 16, 2015 at 14:16 | comment | added | Jim | wouldn't removing gravity from string theory be a bit like charging an electric car with a gas-powered generator? It might still get the job done, but you've removed a large part of what makes it an attractive option in the first place | |
| Mar 16, 2015 at 12:59 | comment | added | Mouse.The.Lucky.Dog | @Mitchell Porter, That really doesn't answer my question since little string theory ( AIUI ) is particular model, whereas my question is about string theories in general. | |
| Mar 16, 2015 at 10:29 | comment | added | Mitchell Porter | See "little string theory". | |
| Mar 16, 2015 at 9:57 | comment | added | Demosthene | Maybe by not allowing closed strings? But that's damaging quite a bit of the theory... In effect, it's closed strings oscillations that are associated with a spin-2 massless particle, which in turn can be understood as a graviton (and hence lead to a string theory with gravity). But it doesn't come with a "label" saying "graviton" on it. | |
| Mar 16, 2015 at 9:23 | history | asked | Mouse.The.Lucky.Dog | CC BY-SA 3.0 |