Can perturbative quantum gravity explain dark matter?

In summary, perturbative quantum gravity is a theoretical framework that combines quantum mechanics and general relativity to study gravity at a small scale, potentially explaining dark matter. Evidence for this idea includes observations of the rotational velocities of galaxies. There are alternative theories, such as modified gravity, axion models, and supersymmetry. While it may not explain other mysteries of the universe, if proven accurate, perturbative quantum gravity could greatly advance our understanding and have practical implications.
  • #1
sevenstar
1
0
I have heard that perturbative quantum gravity calculation predicts an increase of constant G at large distances.

So I simply wonder

can this growth in G naturally explain the galaxy rotation velocity curve?
 
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  • #2
sevenstar said:
I have heard that...
Where did you hear this? Please give us a reference.
 
  • #3
I think you are mistaken... QG predicts the increase of G at small distances (or large energies).
 

1. How does perturbative quantum gravity attempt to explain dark matter?

Perturbative quantum gravity is a theoretical framework that combines the principles of quantum mechanics and general relativity to study the behavior of gravity at a very small scale. It suggests that at these scales, gravity behaves differently than what is predicted by classical physics, and this could potentially explain the presence of dark matter in the universe.

2. What evidence supports the idea that perturbative quantum gravity could explain dark matter?

One of the main pieces of evidence supporting this idea is the observation of the rotational velocities of galaxies. According to classical physics, these velocities should decrease as distance from the center of the galaxy increases. However, observations show that they remain constant, indicating the presence of some invisible mass, which is thought to be dark matter.

3. Are there any alternative theories to perturbative quantum gravity for explaining dark matter?

Yes, there are several alternative theories, such as modified gravity, axion models, and supersymmetry. Each of these theories proposes a different explanation for dark matter and has its own set of predictions and limitations. Currently, there is no consensus on which theory is the most accurate.

4. Can perturbative quantum gravity also explain the other mysteries of the universe, such as dark energy?

While perturbative quantum gravity is a promising framework for explaining dark matter, it does not provide a complete solution for other mysteries of the universe, such as dark energy. Dark energy is thought to be responsible for the accelerated expansion of the universe, and it is still not well understood by any current theories.

5. What are the potential implications if perturbative quantum gravity is proven to explain dark matter?

If perturbative quantum gravity is proven to be an accurate explanation for dark matter, it could significantly advance our understanding of the universe and the fundamental laws of physics. It would also have practical implications, such as helping us develop new technologies and potentially leading to new discoveries about the origins and evolution of the universe.

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