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arXiv:quant-ph/0605221 · Physics Letters B

Exact solution in the Heisenberg picture and annihilation–creation operators

Satoru Odake, Ryu Sasaki B

Published Aug 25, 2006• 48 citations
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Abstract

The annihilation–creation operators of the harmonic oscillator, the basic and most important tools in quantum physics, are generalised to most solvable quantum mechanical systems of single degree of freedom including the so-called ‘discrete’ quantum mechanics. They admit exact Heisenberg operator solution. We present unified definition of the annihilation–creation operators (a(±)) as the positive/negative frequency parts of the exact Heisenberg operator solution.

DOI
10.1016/j.physletb.2006.08.017

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The annihilation–creation operators of the harmonic oscillator, the basic and most important tools in quantum physics, are generalised to most solvable quantum mechanical systems of single degree of freedom including the so-called ‘discrete’ quantum mechanics. They admit exact Heisenberg operator solution. We present unified definition of the annihilation–creation operators (a(±)) as the positive/negative frequency parts of the exact Heisenberg operator solution.
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Various examples of exactly solvable ‘discrete’ quantum mechanics are explored explicitly with emphasis on shape invariance, Heisenberg operator solutions, annihilation-creation operators, the dynamical symmetry algebras and coherent states. The eigenfunctions are the (q-) Askey-scheme of hypergeometric orthogonal polynomials satisfying difference equation versions of the Schrödinger equation. Various reductions (restrictions) of the symmetry algebra of the Askey-Wilson system are explored in detail.