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Quantum Angle




Abstract:
"Quantum action-angle variables are used to describe and analyze a number of familiar systems. For a given system, the quantum canonical transformation from the old coordinates, e.g., linear or polar, to the new coordinates, action-angle variables, is found by generalizing the corresponding classical transformation using a method based upon the correspondence principle, the Hermiticity and canonical nature of the old coordinates, and the requirement that the Hamiltonian be independent of the quantum angle variable. The bound-state energy levels and other important system properties follow immediately from the canonical transformation. Harmonic oscillators of various dimensions and the three-dimensional angular momentum system are used as illustrations; these illustrations provide interesting alternatives to the usual quantum treatments."



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ARTICLES

  • Quantum action-angle-variable analysis of basic systems (Robert A. Leacock and Michael J. Padgett; 17 March 1986)

  • Quantum action-angle variable of Hamilton-Jacobi theory in two dimensions (Gang Chen, Pei Cai Xuan and Jian Li Wang; Expected online publication: March 2006)

  • Josephson tunneling between superconductors in the angle-operator formalism (Yee-Kin Tsui; Feb 1993)

  • Quantum angle