String Theory: Multiverse w/ Same Constants?

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In summary, the concept of the multiverse suggests that there are many universes, each with their own set of physical constants, making up the entirety of the Multiverse. This is supported by M-theory, which states that there are millions of different ways to compactify the 11-dimensional space into the 3+1 dimensional world we live in. Therefore, the variation in physical constants is a result of the mathematical requirements of M-theory. However, the specific mechanism for compactification has yet to be discovered.
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tribdog
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whenever I read an article about string theory stating that our Universe may be one of many making up a Multiverse, they always add, "each having different physical constants"
Do they have to have different constants? Does the math require it? or could the constants be constant?
 
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this multiverse that you are speaking about inhabits in something called the moduli space, and each of the universes is called a vacuum. The set of all the vacua is often referred as The Landscape
The fact that there are so many vacua is imposed by the maths. You have M-theory that is 11-dimensional, and you need to compactify it to the 3+1 dimensional world that we live in, but there are millions of different ways to compactify M-theory, that's why there are so many vacua. So yes, the fact that they have different constants is imposed by the math
 
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  • #3
The math doesn't tell you how the to compactify the spaces though...does it? If so, each space compactify in the same way, yet it seems unlikely? It would be nice if someone found a mechansim which describes compactification process.
 

Related to String Theory: Multiverse w/ Same Constants?

1. What is string theory and how does it relate to the multiverse with the same constants?

String theory is a theoretical framework in physics that attempts to unify all of the fundamental forces of nature. It proposes that the basic building blocks of the universe are not particles, but tiny, vibrating strings. In the context of the multiverse with the same constants, string theory suggests that there could be multiple universes with different physical laws and constants, but all governed by the same underlying principles of string theory.

2. How does the concept of the multiverse with the same constants challenge traditional ideas about the universe?

The concept of the multiverse with the same constants challenges traditional ideas about the universe by proposing that our universe is just one of many possible universes, each with its own set of physical laws and constants. This challenges the idea that our universe is unique and that its physical laws and constants are fixed and unchanging.

3. What evidence supports the existence of the multiverse with the same constants?

Currently, there is no direct evidence for the existence of the multiverse with the same constants. However, some theories in physics, such as string theory, suggest the possibility of multiple universes with different physical laws and constants. Additionally, some observations in cosmology, such as the fine-tuning of our universe's constants, have led scientists to consider the idea of a multiverse with the same constants as a possible explanation.

4. How does the multiverse with the same constants affect our understanding of the origin and evolution of the universe?

The multiverse with the same constants could have significant implications for our understanding of the origin and evolution of the universe. It could potentially explain the fine-tuning of our universe's constants, as well as the existence of dark energy, which is still a mystery in traditional cosmology. It could also challenge the idea of a single beginning of the universe, as the multiverse suggests that our universe may be just one of many that have existed and will continue to exist.

5. Can the multiverse with the same constants be tested or proven?

At this time, the multiverse with the same constants cannot be directly tested or proven. However, ongoing research in fields such as cosmology and particle physics may provide indirect evidence for the existence of a multiverse. Additionally, as our understanding of string theory and other theories in physics improves, we may be able to make more precise predictions about the multiverse and potentially find ways to test its existence.

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