Lecture 1 of Polyakov's Course on String Theory
These lectures were given by Professor Alexander Polyakov when he taught a graduate course on String Theory at Princeton in the fall semesters of 2013 and 2014. Vladimir Kirilin, a student in the class, reviewed the videos.
See more information on the course website below:
https://web.archive.org/web/202208140...
Summary of this lecture by Vladimir Kirilin:
Landau effective action for second order phase transition in the 2d Ising model. Effect of interactions, infrared limit and critical dimension.
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