SephQ
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- TL;DR Summary
- I recently watched a video on Quantum Gravity, and had a few questions.
Disclaimer: I’m new to QM, so things I say might be wrong, please forgive me for possible inaccurate info.
So as for what I know, quantum gravity is the study of merging GR and QM on gravity.
Here’s a few questions I’m interested about on the quantisation of gravity:
String theory
1. What is a graviton in string theory?
2. Why do these 1d vibrating strings exist in a 10d plane such that it somehow bends spacetime?
3. Why is it not really considered to quantize gravity nowadays?
Loop Quantum theory
1. How does spacetime exist as loops?
2. How do you find out the mechanics of space time in a quantum scale?
3. In one of the formulas, it shows that higher energy rays travel in a quicker speed, but in experiments it doesn’t really show so.
(a) Is it possible to work with low energy rays?
(b) Could there be something missing in the formula?
(c) It sounds a bit similar to how light works under refraction, is there any correlation?
Sorry if I asked too much, but that’s about it. Feel free to comment anything you think is right! I’ll come back occasionally to check.
Cave Diving into QM surely did explode my brain, haha.
Best Regards,
Seph
So as for what I know, quantum gravity is the study of merging GR and QM on gravity.
Here’s a few questions I’m interested about on the quantisation of gravity:
String theory
1. What is a graviton in string theory?
2. Why do these 1d vibrating strings exist in a 10d plane such that it somehow bends spacetime?
3. Why is it not really considered to quantize gravity nowadays?
Loop Quantum theory
1. How does spacetime exist as loops?
2. How do you find out the mechanics of space time in a quantum scale?
3. In one of the formulas, it shows that higher energy rays travel in a quicker speed, but in experiments it doesn’t really show so.
(a) Is it possible to work with low energy rays?
(b) Could there be something missing in the formula?
(c) It sounds a bit similar to how light works under refraction, is there any correlation?
Sorry if I asked too much, but that’s about it. Feel free to comment anything you think is right! I’ll come back occasionally to check.
Cave Diving into QM surely did explode my brain, haha.
Best Regards,
Seph