Chapter
Clips
The puzzle of quantum gravity arises from the inconsistency between the particle description of quantum mechanics and the gravitational force in our universe.
54:37 - 56:59 (02:22)
Summary
The puzzle of quantum gravity arises from the inconsistency between the particle description of quantum mechanics and the gravitational force in our universe. While quantum fields and photon particles work for electric forces, applying the same techniques to gravity fails to describe this fundamental force.
ChapterThe Fundamental Entities in String Theory
Episode#204 – Cumrun Vafa: String Theory
PodcastLex Fridman Podcast
String theory proposes that fundamental entities are not particles but one-dimensional strings, each harmonic of which is considered a particle.
56:59 - 1:01:30 (04:30)
Summary
String theory proposes that fundamental entities are not particles but one-dimensional strings, each harmonic of which is considered a particle. The size of these strings is thought to be around 10^-30 centimeters.
ChapterThe Fundamental Entities in String Theory
Episode#204 – Cumrun Vafa: String Theory
PodcastLex Fridman Podcast
Veniziano wrote a mathematical formula to describe the symmetry seen in colliders, which physics found intriguing.
1:01:30 - 1:02:49 (01:19)
Summary
Veniziano wrote a mathematical formula to describe the symmetry seen in colliders, which physics found intriguing. A few years later, people discovered the equation had all the harmonics, leading to the invention of string theory.