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Haifeng Yang added Basic Ideas.tex
over 10 years ago
Commit id: a05619f8a99be2a78fc565bf61a2d5179a04f942
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\begin{enumerate}
\item What are fields? (diff between theory of field and theory of particles)
\item Why quantum field theory?
\begin{enumerate}
\item Desire (photon and phonon)
\item Marriage of QM and R. (\# of part. can change)
\item Fields maybe more fundemantal.
\item Connection between QFT and classical thermal field theory at $T>0$.
\end{enumerate}
\item How to quantize? discretize, solve N-body, take limit.
\item $\mathbf{x}_i(t) \Longleftrightarrow \phi(\mathbf{x}, t)$
\end{enumerate}
