## A quantum approach to the solid state |

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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 | |

152 other sections not shown

### Common terms and phrases

angle antisymmetrical approximation arbitrary asymptotic atom axes axis calculated centrally symmetric field classical mechanics co-ordinates coefficient commute complete complex conjugate components condition constant continuous spectrum corresponding Coulomb field definite values degeneracy degenerate denote density density matrix derived diagonal discrete spectrum eigenfunctions eigenvalues electron terms energy levels expression factor finite follows formula given gives Hamiltonian Hence Hermitian identical particles infinite integral interaction irreducible representations matrix elements mean value measurement molecule momenta motion multiplied non-zero normalised nuclei obtain one-dimensional orbital angular momentum parity particle perturbation theory physical quantity plane possible values potential energy Problem quantum mechanics quantum number quasi-classical region relation respect result rotation Schrodinger's equation Solution spinor of rank stationary Substituting suffixes symmetry tensor tion total angular momentum total spin transformation transition unity unperturbed vanishes variables vector velocity wave function Young diagrams