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| I am reading Steven Weinberg's quantum field theory textbook these days. I attempted to read this book a long time ago to teach myself some quantum field theory but it didn't work out. Now, I can read this book at quite a fast pace, because I know some quantum field theory. As somebody said, this is not a good book to start learning quantum field theory, and I agree to this point of view. In the preface of this book, Weinberg says that he wrote this book to explain why the quantum field theory is as it is and why there is no other choice. I believe that it's worthwhile to read this book. Who knows? Probably, I will end up reading all the three volumes of this book, even though that may take a lot of effort and time. | | |
| By reading the string theory textbook by Becker, Becker and Schwarz, I used to think that we have a different BRST quantization for string theory than the one for quantum field theory. But, today, by reading Polchinski, I found out that the BRST quantization for string theory is just another version of a general BRST quantization. | | |
| I noticed that Edward Witten listed a paper by Prof. Hyun at Yonsei University as a reference for his very famous paper "Anti de Sitter Space and Holography." Therefore, it seems that Prof. Hyun is a great physicist. | | |
| Yesterday, by reading Weinberg's quantum field theory textbook, I found out that de Broglie came up with his theory of matter wave by the observation of the transformation law of k and w in (kx-wt) for the wave equation; E=h bar w was already established, so p= h bar k must be satisfied, as (k,w) as well as (E,p) obeys the Lorentz transformation law. Then he noted that this all makes sense with Niels Bohr's quantization condition for the hydrogen atom. I used to think that de Broglie came up with his theory only from Bohr's quantization condition. | | |
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