The unified-theories tag has no wiki summary.
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1answer
131 views
Early time in the Big Bang
I am not a physicist, so I would really appreciate using a simple language for the explanation of my question. From what I understood at the early Big Bang the four fundamental forces were unified to ...
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3answers
586 views
Why is gravity such a unique force?
My knowledge on this particular field of physics is very sketchy, but I frequently hear of a theoretical "graviton", the quantum of the gravitational field. So I guess most physicists' assumption is ...
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3answers
494 views
Why is gravity so hard to unify with the other 3 fundamental forces?
Electricity and magnetism was unified in the 19th century, and unification of electromagnetism with the weak force followed suit, bringing into play the electroweak force.
I've been told that ...
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1answer
913 views
Unified field theory in layman's terms
I watched some videos on the unified field theory, specifically interviews with Michio Kaku and John Hagelin, and want to learn a bit more about it. I looked up the theory of everything, string theory ...
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3answers
183 views
Is there a mathematical relationship here or am I looking for relations when there are none?
When I was taking classical mechanics, we dealt a lot with pendulums, and orbiting bodies problems. This lead me to think about the two situations depicted above. Left: Shows two balls of equal mass ...
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3answers
159 views
The Role of Gravity among the Fundamental Forces of Nature
If we look at the standard model, we have 4 fundamental forces which include
Gravity,
Electromagnetism,
Nuclear weak force,
Nuclear strong force.
I would like to look at Gravity for a minute. ...
5
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1answer
357 views
Do all the forces become one?
Were the forces of nature combined in one unifying force at the time of the Big Bang?
By which symmetry is this unification governed?
Are there any evidence for such unification of forces?
Has ever ...
3
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1answer
248 views
Spontaneous symmetry breaking in SU(5) GUT?
At the end of this video lecture about grand unified theories, Prof. Susskind explains that there should be some kind of an additional Higgs mechanism at work, to break the symmetry between the ...
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1answer
277 views
The physics community's take on noncommutative geometry
Connes's noncommutative geometry program includes an approach to the Standard Model that employs a noncommutative extension of Riemannian metric. In recent years I've heard physicists say that this ...
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1answer
114 views
Reference-request: Computational science and physics [closed]
I'm interested in the following question:
Is Nature computable at it's most fundamental level?
Can anyone suggest any works (books, papers / articles, reviews) related to the above question?
...
2
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3answers
252 views
What is a good non-technical introduction to theories of everything?
I'm not a physicist but I'm interested in unified theories, and I do not know how to start learning about it. What would be a good book to read to start learning about this topic?
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2answers
527 views
Does string theory and preons exclude each other?
Does string theory contradict the theory of preons, especially the Harari-Shupe one?
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2answers
149 views
What is the relation between extra dimensions and unification of theories?
One of the most used methods in unification of theories is the use of higher dimensions. How does it actually work? If these dimensions are extremely small curled up, how does it affect the universe. ...
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2answers
199 views
Does the existence of dualities imply a more fundamental structure?
I was wondering if the existence of some kind of duality in physics always implies the existence of some underlying more fundamental structure/concept?
Let me give a few example from history:
...
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5answers
303 views
Does Kaluza-Klein theory successfully unify GR and EM? Why can't it be extended to the Standard Model gauge group?
As a quick disclaimer, I thought this might be a better place to ask than Physics.SE. I already searched there with "kaluza" and "klein" keywords to find an answer, but without luck. As background, ...
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2answers
293 views
Quantum mechanics + General relativity =?
I have learned (the basics) of how one can incorporate the principles of special relativity to quantum mechanics to obtain quantum field theory. Can the same be done with GR and QM to obtain a new ...
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3answers
314 views
GUT that includes all 3 particle families into a large group?
Explaining SU(5) GUTs (using the first particle family as an example) in the last SUSY lecture 10, Lenny Susskind mentioned that there are at present no ideas how to combine simultaneously all 3 ...
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Why are extra dimensions necessary?
Some theories have more than 4 dimensions of spacetime. But we only observe 4 spacetime dimensions in the real world, cf. e.g. this Phys.SE post.
Why are the theories (e.g. string theory) that ...
