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Forums
Physics
Beyond the Standard Models
Why do dimensions curl up or expand?
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[QUOTE="Cepatiti, post: 6831755, member: 729848"] Are you referring to this paper: [URL='https://arxiv.org/abs/hep-th/0303031#:~:text=In%20gravitational%20theories%20with%20extra,of%20our%20four%2Ddimensional%20world']The fate of four dimensions[/URL] ? Personally, I didn't know that paper. I didn't check, but does it have a lot of follow-up papers? Some remarks related to your question: As far as I know, there is no well-established model in string theory explaining why some dimensions are compact and others not. Another question to ponder is why these compact dimensions remained small during the cosmic inflation. Here I read something in the past about cosmic strings, which stated that during the inflationary epoch, cosmic strings were wrapped around the compact dimensions, thus preventing them from expanding. Unfortunately, I do not have a reference for this anymore. [/QUOTE]
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Physics
Beyond the Standard Models
Why do dimensions curl up or expand?
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