String theory builds on the conceptual foundations that have been established in elementary particle physics in the 1970s. It is a quantum theory that aims at reproducing the interaction …

The string section of the handbook aims at giving an introduction to this exciting field, ranging from formal aspects to phenomenological implications in particle physics and cosmology.

These notes are not verbatim; I watched the lectures and reproduced them afterwards. Part I of this document follows the lecture series by Susskind titled “String theory and M-theory.” This is …

By replacing point-like particles with one-dimensional strings vibrating in a higher-dimensional space, string theory offers a unique perspective on the fundamental nature of reality, …

First, we expect the string to have a continuous value of the center of mass momentum. On the other hand the internal motion of the string is bounded so, for that part, we expect a discrete …

An ideal string has no stiffness and has uniform linear density (μ) throughout. The restoring force for transverse vibrations is provided solely by the tension (T) in the string.

Professor Zwiebach’s “A First Course in String Theory” is the main textbook for this course, which we’ll loosely follow (and have assigned readings and problems taken from).