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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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This is a brief post about non-geometric backgrounds in string theory. These can be thought of as “spaces” that don’t have a “geometric” interpretation. A basic understanding of field theory is required.
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This post explores why critisizing string theory has become a “cool thing” in the last few years.
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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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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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This is a chapter-by-chapter review of volume 1 of Polchinski’s book on string theory.
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So we have done a post on type II strings and a post on heterotic strings in the past. Now, let’s do a post on type I strings to cover all 5 known consistent superstring theories.
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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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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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Why do we have two heterotic theories i.e. SO(32) heterotic and E8 X E8 heterotic? How do we come to this conclusion? I will present some results without derivation because their derivation requires calculations. A very basic understanding of quantum field theory is assumed and it is better if the reader has already read my…
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