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arXiv 0809.5098gr-qc
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高分子量子化、奇异性分辨和1/r^2势

Polymer quantization, singularity resolution and the 1/r^2 potential

G. Kunstatter, J. Louko, J. Ziprick

摘要:

我们提出了一个聚合物量子化的-lambda/r^2势的正实数线和数值计算的束缚态本征能量的无量纲耦合常数λ。原点处的奇异性有两种处理方式:第一,通过正则化势并采用对称或反对称边界条件;第二,通过保持势不正则化,但允许奇异性通过反对称边界条件来平衡。结果与高分子理论的半经典极限和L_2(R_+)上的常规薛定谔量子化进行了比较。各种量子化方案对于高激发态是非常一致的,但是对于低激发态是不同的,并且聚合物光谱被限制在下面,即使薛定谔光谱不是。我们发现,正如预期的反对称边界条件的正规化的潜力是多余的:聚合物量子理论是很好的定义,即使与非正规化的潜力和正规化的潜力并没有显着影响的光谱。

英文摘要:

We present a polymer quantization of the -lambda/r^2 potential on the positive real line and compute numerically the bound state eigenenergies in terms of the dimensionless coupling constant lambda. The singularity at the origin is handled in two ways: first, by regularizing the potential and adopting either symmetric or antisymmetric boundary conditions; second, by keeping the potential unregularized but allowing the singularity to be balanced by an antisymmetric boundary condition. The results are compared to the semiclassical limit of the polymer theory and to the conventional Schrodinger quantization on L_2(R_+). The various quantization schemes are in excellent agreement for the highly excited states but differ for the low-lying states, and the polymer spectrum is bounded below even when the Schrodinger spectrum is not. We find as expected that for the antisymmetric boundary condition the regularization of the potential is redundant: the polymer quantum theory is well defined even with the unregularized potential and the regularization of the potential does not significantly affect the spectrum.

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