Exploring Planck World: The Search for the Final Theory

[stglyde]

What do you think about Planck world? It is the heart and meat of search for Final Theory.

Do you believe time doesn't exist in Planck world?

http://discovermagazine.com/2007/jun/in-no-time/article_view?b_start:int=1&-C=

Or do you believe Space doesn't exist there in Planck world?

http://arxiv.org/abs/0909.1861

Or do you believe Planck contains 11 Spacetime Dimensions as in Superstring Theory?

What do you think is in Planck world where the equations of quantum mechanics and general relativity break down? What is the most promising approach and the most likely based on deductions from all existing facts of theoretical physics?

 

[AndyW]

I find the concept of Planck world to be a fascinating and challenging topic in the search for a final theory. The idea that there may be a fundamental level of reality that is beyond our current understanding is both exciting and daunting.

Regarding the question of whether time exists in Planck world, it is important to first define what we mean by time. In the context of our current theories, time is a fundamental component of spacetime, and it is inseparable from space. However, some theories, such as loop quantum gravity, propose that time may emerge from a more fundamental level of reality. In this sense, time may not exist in the same way that we perceive it at the Planck scale.

Similarly, the concept of space at the Planck scale is still not well understood. Some theories, such as loop quantum gravity and causal dynamical triangulation, suggest that space may be discrete and quantized at this level. This means that there is a smallest unit of space, known as the Planck length, beyond which it no longer makes sense to talk about space. This is a radical departure from our current understanding of space as a continuous and infinitely divisible entity.

The idea of 11 dimensions in Superstring Theory is also a fascinating one, as it suggests a much more complex and intricate structure to our universe than we currently perceive. However, it is important to note that this is still a highly speculative theory and has not yet been confirmed by experimental evidence.

As for what is actually in Planck world, it is difficult to say for certain as we are limited by our current understanding and technology. However, based on current deductions from theoretical physics, it is likely that the fundamental building blocks of our universe, such as particles and forces, are present at this scale. It is also possible that we may find a unifying theory that can reconcile quantum mechanics and general relativity at this level.

In conclusion, while the concept of Planck world is still largely a mystery, it is a fascinating area of study in the search for a final theory. The most promising approach is likely to be a combination of different theories and approaches, as is often the case in science. Only through continued research and advancements in technology will we be able to unravel the mysteries of this fundamental level of reality.