lec # topics Lecture 19: Scattering L19.1 L19.1 Elastic scattering defined and assumptions (15:35) L19.2 L19.2 Energy eigenstates: incident and outgoing waves. Scattering amplitude (25:02) L19.3 L19.3 Differential and total cross section (20:20) L19.4 L19.4 Differential as a Sum of Partial Waves (17:46) Lecture 20: Scattering (continued 1) L20.1 L20.1 Review of Scattering Concepts Developed So Far (9:02) L20.2 L20.2 The One-Dimensional Analogy for Phase Shifts (16:57) L20.3 L20.3 Scattering Amplitude in Terms of Phase Shifts (14:59) L20.4 L20.4 Cross Section in Terms of Partial Cross Sections. Optical Theorem (13:13) L20.5 L20.5 Identification of Phase Shifts. Example: Hard Sphere (18:01) Lecture 21: Scattering (continued 2) L21.1 L21.1 General Computation of the Phase Shifts (18:14) L21.2 L21.2 Phase Shifts and Impact Parameter (27:38) L21.3 L21.3 Integral Equation for Scattering and Green’s Function (30:26) Lecture 22: Scattering (continued 3). Identical Particles L22.1 L22.1 Setting Up the Born Series (21:07) L22.2 L22.2 First Born Approximation. Calculation of the Scattering Amplitude (13:02) L22.3 L22.3 Diagrammatic Representation of the Born series. Scattering Amplitude for Spherically Symmetric Potentials (21:41) L22.4 L22.4 Identical Particles and Exchange Degeneracy (19:41) Lecture 23: Identical Particles (continued 1) L23.1 L23.1 Permutation Operators and Projectors for Two Particles (22:22) L23.2 L23.2 Permutation Operators Acting on Operators (11:44) L23.3 L23.3 Permutation Operators on N Particles and Transpositions (29:39) L23.4 L23.4 Symmetric and Antisymmetric States of N Particles (11:34) Lecture 24: Identical Particles (continued 2) L24.1 L24.1 Symmetrizer and Antisymmetrizer for N Particles (16:48) L24.2 L24.2 Symmetrizer and Antisymmetrizer for N Particles (continued) (24:53) L24.3 L24.3 The Symmetrization Postulate (11:37) L24.4 L24.4 The Symmetrization Postulate (continued) (continued) (20:49)