Problems in Quantum Mechanics

anti-symmetrical approximation asymptotic axis bi-spinor bound calculate Chapter charge classical coefficients components condition constant coordinates corresponding Coulomb defined denote differential cross-section dipole Dirac equation E₁ eigenfunctions eigenvalues eigenvectors electron energy levels energy spectrum expression follows free particle function given Green's function Hamiltonian harmonic oscillator hence Hermitian hydrogen atom hydrogen-like atom integral equation interaction isotopic spin kinetic energy Klein-Gordon equation linear magnetic field matrix elements motion non-relativistic notation nucleons nucleus obtain operator orbital angular momentum permutation perturbation theory polar poles potential energy preceding problem probability protons quantum mechanics quantum number R₁ relation representation result rotation satisfies scattering cross-section Schrödinger equation second quantization Show sin² solution spherical symmetrical time-dependent transformation transition unperturbed valid vanishes variables vector wavefunction whence WKB approximation written Y₁ zero Απ