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Group Theory Book
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Consider the book Group Theory in Physics - Problems and Solutions by Michael Aivazis. Here is the table of contents. (1) Basic group theory (2) Group Representations (3) General properties of ...

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How do I determine the polarizability of a material?
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Here is a theoretical understanding of polarization and polarizability using functionals. Let us denote the external electric field generated by free charges (which are all outside of the dielectric ...

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A Good Problem and Solutions Book for Many Body Physics
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Here is a problems and solutions (solutions in the back of the book) for topics 2,3,6, and 7 Theoretical Physics 9: Fundamentals of Many-body Physics Second Edition Author: Wolfgang Nolting Here is ...

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Evaluating Correlation Function for the Classical Ising Chain
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See the following link for a beautiful explanation: https://stanford.edu/~jeffjar/statmech/lec4.html#solving

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Klein-Gordon Charge Acting Like Angular Momentum
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Here is answer to my question, which I got with the help of @Connor Behan. The $a = b$ case is shown in the question post. For the $a\neq b$ case we have $(\alpha_{ip}^\dagger \alpha_{lp})( i\epsilon_{...

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Deriving the Majorana equations of motion from a Lagrangian density
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$\chi^T \sigma^2 \chi = (-\chi^* \sigma^2 \chi^\dagger)^*$ and then differentiate to get another $-\frac{im}{2}\sigma^2 \chi^*$ Note that the values $\chi$ takes are Grassmann numbers and so, as noted ...

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