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ensabah6
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Spacetime is 3D + 1T = 4D
Is spacetime in string theory 4D as a result of compactification, or 12D, 11D+1T?
Is spacetime in string theory 4D as a result of compactification, or 12D, 11D+1T?
ensabah6 said:Is spacetime in string theory 4D as a result of compactification, or 12D, 11D+1T?
String theory is a theoretical framework that attempts to reconcile gravity with quantum mechanics by describing the fundamental building blocks of the universe as tiny strings rather than point-like particles.
String theory requires 10 dimensions to be consistent. However, it is often extended to 11 dimensions in order to incorporate supergravity, a supersymmetric version of general relativity.
The answer is both. In the original version of string theory, spacetime is 10-dimensional. However, in more recent developments, it has been proposed that there may be additional curled-up dimensions, bringing the total to 11 or 12 dimensions.
The additional dimensions in string theory allow for more complex structures and interactions between particles, which may help to resolve some of the issues that arise in traditional 4-dimensional spacetime. However, these extra dimensions are currently only theoretical and have not been observed or confirmed.
At this time, there is no direct evidence for the existence of extra dimensions in string theory. However, some indirect evidence has been found in certain astrophysical observations and experiments, such as the behavior of cosmic rays and the results of particle collider experiments.