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arXiv math-ph/0112004math-phmath.GRmath.MP
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SO(2,1)李代数的分次扩张及Dirac方程的点正则变换精确解

Graded extension of SO(2,1) Lie algebra and the search for exact solutions of Dirac equation by point canonical transformations

A. D. Alhaidari

摘要:

SO(2,1)是一类三参数问题的对称代数,包括振子、库仑势和Morse势以及其他零能量问题。这类势都可以通过点正则变换映射到振子势。我们称这个类为“振荡器类”。定义了SO(2,1)的一个非平凡分次扩张,并给出了它在旋量空间中的二维微分算子矩阵的实现。结果表明,这个分次代数是一类相对论势的超对称代数,这类势包括Dirac-振子势、Dirac-库仑势和Dirac-Morse势。这个类实际上是振子类的相对论性扩展。提出了一种新的与相对论问题相容的点正则变换。它将所有这些相对论性势映射到狄拉克-振子势。

英文摘要:

SO(2,1) is the symmetry algebra for a class of three-parameter problems that includes the oscillator, Coulomb and Morse potentials as well as other problems at zero energy. All of the potentials in this class can be mapped into the oscillator potential by point canonical transformations. We call this class the "oscillator class". A nontrivial graded extension of SO(2,1) is defined and its realization by two-dimensional matrices of differential operators acting in spinor space is given. It turns out that this graded algebra is the supersymmetry algebra for a class of relativistic potentials that includes the Dirac-Oscillator, Dirac-Coulomb and Dirac-Morse potentials. This class is, in fact, the relativistic extension of the oscillator class. A new point canonical transformation, which is compatible with the relativistic problem, is formulated. It maps all of these relativistic potentials into the Dirac-Oscillator potential.

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