PHYSICS 64-544 Theory of Atomic Structure and Atomic Spectra Lectures so far: May 17 1/2 hour Introduction, exact diagonalization vs. pert. theory Assignment: - prove that a power series expansion for the exact diagonalization of a 2 x 2 matrix is the same as perturbation theory up to second order. May 19 1 hour: Schrodinger equation, Z-scaling, units Assignment: - Derive the Z-scaled Schrodinger equation. May 31 no lecture (all research) June 2 Hartree-Fock and configuration interaction (C.I.) Assignment: - derive the H.F. equations - prove that the variational principle is equivalent to diagonalization of the Hamiltonian. June 7 1/2 hour - completeness & Sturmian functions Assignment: - Derive the orthogonality condition for Sturmian functions. - Find and read Ince's book on Sturmian functions. - show that the r.h.s of the spherical harmonic addition theorem for cos(theta12) is rotationally invariant. June 9 1 hour - brute force method and the power method for the generalized eigenvalue problem. Assignment - Write a program to solve the generalized eigenvalue problem for hydrogen s-states, assuming basis functions of the form phi_i = r^i exp(-alpha r) June 21 1/2 hour - discussion of matrix diagonalization by Jacobi's method, and formalism to write all N eigenvectors simultaneously as a matrix. June 28 1 hour - discuss sample program hbasis4.for, Jacobi method and power method. - review spherical harmonics - derive expression for del^2 in Hylleraas coords. July 5 1 hour - angular integrals and radial recursion relations. July 12 July 14 no lecture - in Montreal July 19 Hermitian form for the Hamiltonian July 21 small corrections - finite nuclear mass Aug. 2 Begin angular momentum algebra pp 1-5. Aug. 4 pp. 6-10. Future Topics 1. remainder of notes on solving the Schroedinger equation for helium. 2. Dirac equation and relativistic effects in atomic physics. 3. introduction to quantum electrodynamics (QED). 4. introduction to group theory and symmetry operations. 5. angular momentum coupling. 6. Wigner-Eckart theorem. 7. 3-j and 6-j symbols. 8. diagrammatic techniques for angular momentum coupling.