Chapter
Loop Quantum Gravity
1:54:34 - 2:00:55 (06:21)
Loop quantum gravity is a theoretical framework that aims to describe the universe in terms of quantum mechanics, emphasizing topological gravity aspects. Its ideas include taking points and putting them together in a discrete fashion, reminiscent of the plank scale, and aspects that were not initially thought of as part of the theory can be incorporated into it, as seen in string theory.
Clips
String theory, originally believed to be a theory of ten dimensions, underwent changes as new aspects were discovered through thought experiments.
1:54:34 - 1:58:11 (03:37)
Summary
String theory, originally believed to be a theory of ten dimensions, underwent changes as new aspects were discovered through thought experiments. For instance, it was eventually realized that string theory needed to account for 11 dimensions.
ChapterLoop Quantum Gravity
Episode#204 – Cumrun Vafa: String Theory
PodcastLex Fridman Podcast
Loop quantum gravity shares some quantum space ideas with string theory, such as topological gravity aspects, but lacks some of its features.
1:58:11 - 2:00:55 (02:43)
Summary
Loop quantum gravity shares some quantum space ideas with string theory, such as topological gravity aspects, but lacks some of its features. String theory has a property where if space is made smaller than the plank scale, by a factor of 10, it is equivalent to making the space bigger, while in loop quantum gravity, this inversion is a very subtle effect.