## Quantum mechanics IIThis is a textbook on non-relativistic quantum mechanics that emphasizes clarification of the nature of the basic postulates and the interpretation of the theory. It contains special material, often only accessible in scientific journals, on bound states, scattering theory, and both analytical and approximation techniques. Applications to many branches of physics are given. Among the topics covered are one-dimensional problems, angular momentum, two-particle systems, symmetry transformations, collision theory, the WKB method, and stationary and time-dependent perturbation and variational techniques. Particles in an electromagnetic field, many-body systems, atoms, and radiation theory are studied. The book is a considerably improved and completely updated English translation of a very successful Spanish textbook and is aimed at students in their second year of university. |

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### Contents

Scattering Theory | 1 |

The W B K Method | 88 |

TimeIndependent Perturbation Theory and Variational Method | 122 |

Copyright | |

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### Common terms and phrases

analytic angular momentum antisymmetric assume asymptotic atoms behavior Born approximation bosons bound central potentials channel classical coefficients collision computation configuration consider constant converges coordinates corresponding Coulomb defined degeneracy derive differential cross section eigenstates eigenvalues electrons energy levels evolution example expansion exponentially fermions final finite FL(p formulae gauge given Hamiltonian harmonic oscillator Hartree-Fock Hence identical particles implies initial integral interaction invariant magnetic field matrix elements momenta normalized nuclear nucleon nucleus obtain operator optical theorem orbital orthogonal perturbation theory phase shifts photon Phys physical plane possible problem quantization Quantum Mechanics quantum numbers radiation region satisfies scattering amplitude Schrodinger equation Sect self-adjoint shells single-particle solution spectrum spherical spin subspace symmetric Taking into account term theorem transition probability turning points unitarity unitary values vanish variables vector W.B.K. approximation W.B.K. method wave function Zeeman effect zero