Junpei Sakurai

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An attempt is made to construct a theory of all weak processes from a single invariance principle. The requirement that the weak interaction Hamiltonian be invariant under the reversal of the sign of the mass in the Dirac equation separately for any fcrmion field leads to a unique form of the four-fermion interaction responsible for weak processes. The(More)
The van der Waals interaction is discussed in Chapter 5 of J. J. Sakurai, Modern Quantum Mechanics. Here I take a look at it in a little more depth. It provides a nice application of perturbation theory. 1 Two atoms We consider two atoms A and B. Atom A has a center of mass position R A and constituents at positions r a + R A. That is, r a is the difference(More)