Are 10 spatial dimensions necessary for M-Theory?

In summary, the conversation discusses string theory and the possibility of extra dimensions being spatial. The question also raises whether the nature of these dimensions demands them to be spatial or if it is just easier to explain and understand them that way. There is also a mention of string theory's explanation of quantum entanglement and whether the test of Bell's inequality requires reality to be non-local. A resource is provided for understanding Bell's theorem and the suggestion to ask further questions in the Quantum Mechanics forum.
  • #1
dpa
147
0
Hi Everyone,

I have not understood or even studied string theory.

However I was wondering whether the extra dimensions demanded by M-theory (10 spatial dimensions in that case), other string theories or even any other field theories necessarily demand the dimensions higher than four dimensions all are spatial.

Is it the nature (mathematical) of those dimensions that demand such dimensions to be spatial?
Or are remaining dimensions called spatial because we feel that would be easier to deal with/to explain and are more intuitive?

Thank YOu
Sincerely
DPA
 
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  • #2
and yes, another question,
does string theory explain quantum entanglement.
Lots of questions, but last one,
does test of bell's inequality necessarily require reality to be non local.
 
  • #3
dpa said:
does string theory explain quantum entanglement.
Probably not, but see
http://xxx.lanl.gov/abs/hep-th/0605250

dpa said:
does test of bell's inequality necessarily require reality to be non local.
Not necessarily:
https://www.physicsforums.com/blog.php?b=3622 [Broken]
 
Last edited by a moderator:
  • #4
dpa said:
does test of bell's inequality necessarily require reality to be non local.
If you want to understand Bell's theorem, so that you can make up your own mind about this, you can read the excellent explanation http://quantumtantra.com/bell2.html. And if you have more questions about entanglement and Bell's theorem, you should ask them in the Quantum Mechanics forum.
 

1. What is M-Theory?

M-Theory is a theoretical framework in physics that aims to unify the various versions of string theory. It suggests that the universe is made up of 11 dimensions, with 10 spatial dimensions and one time dimension.

2. Why do we need 10 spatial dimensions for M-Theory?

In M-Theory, 10 spatial dimensions are necessary in order to reconcile the inconsistencies between the different versions of string theory. This number is also supported by mathematical equations that describe the behavior of particles in these dimensions.

3. How do we know that there are more than 3 dimensions?

The existence of extra dimensions is supported by various theories and experiments, such as string theory, which predicts the need for extra dimensions to explain the behavior of particles at a fundamental level. Additionally, some experiments have also shown evidence of extra dimensions through the observation of gravitational effects that cannot be explained by just three dimensions.

4. Can we see or experience these extra dimensions?

No, we cannot see or experience these extra dimensions directly. They are believed to be extremely small and compactified, meaning they are curled up and hidden from our perception. However, their effects can be observed through experiments and mathematical calculations.

5. Is there any practical application of understanding 10 spatial dimensions?

While it may seem abstract and purely theoretical, understanding 10 spatial dimensions could have practical implications in fields such as quantum computing and high-energy physics. It could also lead to a better understanding of the fundamental laws of the universe and potentially unlock new technologies in the future.

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