Is a Grand Unifying Theory Possible? Exploring the Evolution of Physical Laws

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In summary: There is no need for a higher theory to describe the change because the lower theory can describe it.Hi, New member, first post. Is a Grand Unifying Theory even possible? If there is evolution on our planet, why would there not be an evolution of the laws of the universe? What we theorize, test and measure may be true of our universe at this time point, but could it not be that at the edge of the universe, physical laws have evolved to a point which would never be compatible with the laws we currently use to describe our measurable universe?If the laws of the universe have always been true, then a Grand Unifying Theory would not be possible because
  • #1
luigidopobici
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Hi,

New member, first post.

Is a Grand Unifying Theory even possible?

If there is evolution on our planet, why would there not be an evolution of the laws of the universe? What we theorize, test and measure may be true of our universe at this time point, but could it not be that at the edge of the universe, physical laws have evolved to a point which would never be compatible with the laws we currently use to describe our measurable universe?

Sorry if it is a profoundly stupid question.
 
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  • #2
Hi Luigi, welcome to the PF. I have also wondered if the laws of the universe need to be constant from the BB until the end of the universe. The structure of the universe has changed incredibly, also the effect of dark energy has changed over past 7B years, so perhaps some of the laws and physical constants of the universe could have changed also. It would require this grand Physics experiment that we exist into have a little less initial fine tuning!
 
  • #3
Thanks

Tanelorn said:
It would require this grand Physics experiment that we exist into have a little less initial fine tuning!

Which of the Rees Six Numbers and why?
 
  • #4
I am only an initiate and a retro one at that so you will need help from a pro now.
 
  • #5
Hi Luigi,

Just to clarify you seem to be asking two different questions. Firstly is a Grand Unification Theory possible and secondly have the laws of physics always been so.

Your use of the word evolution is a little misleading because evolution brings up connotations of biological evolution which has little to do with the laws of physics aside from working within them. A resident expert may be able to give you a better answer but I do not know of any reason why a GUT could not exist and contemporary understanding in physics is that the laws of physics have always been true.
 
  • #6
luigidopobici said:
Hi,

New member, first post.

Is a Grand Unifying Theory even possible?

If there is evolution on our planet, why would there not be an evolution of the laws of the universe? What we theorize, test and measure may be true of our universe at this time point, but could it not be that at the edge of the universe, physical laws have evolved to a point which would never be compatible with the laws we currently use to describe our measurable universe?

Sorry if it is a profoundly stupid question.
If there is an evolution of the laws then there is a way to describe how those laws change over time, and the theory which describes how those laws change over time will be static. So there has to be some unified theory by definition.
 
  • #7
Chalnoth said:
the theory which describes how those laws change over time will be static.

Why is this necessarily the case?
 
  • #8
luigidopobici said:
Why is this necessarily the case?
Because the higher theory is describing the change over time. As long as that change is describable, you can do so with a fixed set of laws.
 

1. Is a Grand Unified Theory (GUT) possible?

The answer to this question is still unknown. The concept of a GUT is a theoretical framework that aims to unify the fundamental forces of nature, including gravity, electromagnetism, and the strong and weak nuclear forces. While there have been efforts to develop a GUT, such as string theory and supersymmetry, there is currently no conclusive evidence or experimental proof that a GUT exists.

2. What are the main challenges in creating a GUT?

One of the main challenges in creating a GUT is the reconciliation of gravity with the other fundamental forces. Gravity, as described by Einstein's theory of general relativity, does not fit into the framework of quantum mechanics, which describes the other three forces. Additionally, there is currently no experimental evidence to support the existence of a GUT, making it difficult to test and validate theories.

3. What is the role of mathematics in developing a GUT?

Mathematics plays a crucial role in the development of a GUT. The unification of the fundamental forces requires complex mathematical equations and calculations to be able to explain and predict the behavior of the universe. Many physicists believe that a GUT can only be achieved through elegant mathematical theories and equations.

4. How would a GUT impact our understanding of the universe?

If a GUT is successfully developed, it would provide a more comprehensive understanding of the universe and its fundamental laws. It would also potentially lead to new technologies and advancements in science. Additionally, a GUT could help resolve some of the unanswered questions in physics, such as the nature of dark matter and dark energy.

5. Are there any experiments currently being conducted to test the existence of a GUT?

While there are no direct experiments being conducted to test the existence of a GUT, there are experiments being conducted to test related theories, such as supersymmetry and higher dimensions. These experiments, such as the Large Hadron Collider at CERN, aim to find evidence that supports the existence of a GUT and provide insights into the behavior of the universe at the smallest scales.

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