Tag: symmetry
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Barbour-Bertotti best matching
This post is first in a series about some of my recent work. It tries to implement a procedure called Barbour-Bertotti best matching principle (explained below) using an approach called Entropic Dynamics (explained in a future post). Suppose you see three stars in the sky and take a picture of them at a given time.…
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Getting realistic vaccua from string theory (A summary)
This is a small post on how to try to get realistic four-dimensional spacetimes from type IIA and type IIB string theories. I will try to explain the technical points as much as I can. I will assume the knowledge of metric, Ricci, and Riemann tensors and very basic QFT. Let me know if some…
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Have we found all string theories?
This brief post answers the question, “Have we found all string theories?”. It will require a basic understanding of QFT and symmetry algebras.
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String Theory and M theory compactifications
This is a post about compactifications in superstring theory and M theory. This post is related to my second Ph.D. project. A little familiarity with the Ricci tensor and the word “gauge group” is assumed but I tried to make it self-contained.
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Polchinski Volume 1 review
This is a chapter-by-chapter review of volume 1 of Polchinski’s book on string theory.
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Gauge groups in bosonic and Type I string theories
A small post about how the cancellation of anamolies determine the unique gauge group that arises in bosonic and Type I string theories.
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D Branes in Type II string theories
Let’s do a small post on D-Branes and their charges. Before starting, we will review some familiar concepts so that it is easy to understand what follows. A very basic understanding of electromagnetism and Quantum Field Theory (QFT) is assumed.
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Symmetries in Physics
Let’s do a popular audience level post about the types of symmetries used in particle physics. I will try to make the explanations as simple as possible without compromising the stuff that I want to explain.
Hassaan Saleem 