By A. R. Edmonds
This publication deals a concise creation to the angular momentum, probably the most basic amounts in all of quantum mechanics. starting with the quantization of angular momentum, spin angular momentum, and the orbital angular momentum, the writer is going directly to speak about the Clebsch-Gordan coefficients for a two-component procedure. After constructing the required arithmetic, particularly round tensors and tensor operators, the writer then investigates the 3-j, 6-j, and 9-j symbols. all through, the writer presents functional purposes to atomic, molecular, and nuclear physics. those contain partial-wave expansions, the emission and absorption of debris, the proton and electron quadrupole second, matrix aspect calculation in perform, and the homes of the symmetrical best molecule.
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Additional info for Angular momentum in quantum mechanics
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In addition, Leggett's program is extraordinarily valuable for deepening our analysis of the foundations of quantum mechanics. If quantum mechanics is a physical theory of unlimited validity, not merely as an instrument for systematizing and predicting experimental outcomes but as a characterization of the properties of physical things themselves, then there is a well-known anomaly implicit in it. The quantum mechanical superposition principle would apply to states of macroscopic as well as microscopic systems, and there are situations, under appropriate initial conditions, where the measurement of a property of a microscopic system would imply a superposition of macroscopically different states of the measuring apparatus.
Angular momentum in quantum mechanics by A. R. Edmonds