Hadron resonance scattering amplitudes can be calculated from the energy level of the system. Luscher introduced a method that relates the phase shift with the energy level of the scattering system in centre of mass (CM) frame, while Gotlieb generalized this method to non-rest frame, including the lab frame.
In this note we'll discuss classical bosonic strings, and briefly introduce the quantization procedure.
This note follows Superstring Theory by Edward Witten, and Introduction to String Theory and M-Theory by Michio Kaku.
In differential geometry, and especially in general relativity, the Riemann curvature tensor is an important object for the geometric property of a manifold, solving the Enstein's equation one always needs to calculate the curvature tensor. But the component expression of Riemann tensor is too complicated, making it painful to calculate it by hand, and less powerful when dealing with various problems. Instead, using curvature 2-form would somehow be better.
As you may have noticed, my site haven't been updated for almost 3 years! This could results from that I have been busy with a lot things, such as exams, final thesis, plus that I'm running out of ideas. But now, I'm in a relatively free period and I want to keep my blog from being abandonded.
My future blogs will mainly be my notes that explain my understanding of things I have learned.
- Belows are old posts