Category: Academia
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All three laws of motion matter
In this post, I will try to explain why all three laws of motion are independent and why the first and third laws of motion aren’t special cases of the second law. Newton’s first law of motion says that “An object continues its state of motion until an external force is applied on it”. However,…
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What are conformal field theories? (Part 1)
In this series of posts, I will explain what conformal field theories (CFTs) are. Basic familiarity with Quantum Field Theories (QFTs) is assumed. In usual relativistic QFTs have some spacetime symmetries. These symmetries are rotations (one about every space direction), boosts (one along every space direction) and translations (one along every spacetime direction). The set…
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My 10 years in Physics
Today (20th October 2024) completes my 10 years as a university student (studying Physics). I took my first class as a Physics undergraduate on 20th October 2014 at the University of the Punjab, and in these 10 years, so much happened. There have been a lot of ups and downs that I have gone through…
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How to derive the Schwarzchild metric?
In this post, we will go through the reasoning that gives us the Schwarzchild solution of Einstein field equations. Prerequisites for this post include familiarity with Einstein field equations. We start with the Einstein field equation (EFE) and convert it to a form that is used to solve this equation. This form is called the…
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How to deduce Schrodinger equation?
In this post, I will give arguments to motivate why Schrodinger equation has the form that it has. An understanding of classical mechanics, eigenvalues and eigenfunctions is required for following this post. In conventional formulation of quantum mechanics, there are some postulates. Among them, three postulates are as follows. The “operators” mentioned above operate on…
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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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On attending talks
(Please keep in mind that since I am a Physics student, some of my examples will be more relevant to Physics and Mathematics but most of the things discussed here apply to arbitrary fields of study). There is something, about which I don’t have a strong opinion, although I want to have a strong opinion…
Hassaan Saleem 