"S-matrix or scattering matrix"의 두 판 사이의 차이

2011년 6월 8일 (수) 06:45 판

transition amplitude are too hard to calculate from the theory, except in infinite time limits
those limits are the entries of the S-matrix
typical way to compute S-matrix entries is using correlation functions and Ward identity

probability amplitude from initial states to final states
Feynman diagram is a tool to compute the probability amplitudes.
- transition amplitude
- scattering amplitude
  - computation of S-matrix (S = Scattering)
  - cross section
these are important because they are physically measurable quantity
- similar to correlation functions in Conformal Field Theory
- look at correlation functions and Ward identity page

@@ 37번째 줄: / 37번째 줄: @@
 * [[path integral formulation of quantum mechanics|Path integral]]
 * [[string S-matrix]]
-*
+* [[affine Toda field theory (ATFT)|affine Toda field theory]]