## Quantum Mechanics: Non-relativistic Theory |

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### Contents

THE BASIC CONCEPTS OF QUANTUM MECHANICS 1 The uncertainty principle | 1 |

2 The principle of superposition | 6 |

3 Operators | 8 |

Copyright | |

129 other sections not shown

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### Common terms and phrases

angle antisymmetrical approximation asymptotic atom axes axis calculated classical mechanics coefficients collision commute complex conjugate components condition constant continuous spectrum corresponding definite values degeneracy degenerate denote derivative determined diagonal with respect direction discrete spectrum distances effective cross-section eigenfunctions eigenvalues electron term energy levels expression factor finite follows formula given gives Hamiltonian Hence identical particles infinite infinity integral interaction intersection inversion irreducible representations Let us consider matrix elements mean value molecule momenta motion multiplied non-zero normalised nuclei obtain operator orbital angular momentum orthogonal parity particle perturbation theory physical quantity plane potential energy probability Problem quantum mechanics quantum number quasi-classical region relation result rotation scattering Schrodinger's equation solution spherical spinor spinor of rank stationary Substituting suffixes symmetry symmetry group tion total angular momentum total spin transformation transitions vanishes variables vector velocity vibrations wave function Young diagrams zero