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arXiv quant-ph/0207077quant-ph
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含差分算子的量子力学

Quantum Mechanics with Difference Operators

V. K. Dobrev, H. -D. Doebner, R. Twarock

摘要:

从第一性原理出发,研究了用加性和乘性(q-)差分算子代替微分算子的量子力学的一种表述。光滑配置空间上的Borel量化被用作指导量化方法。经过简短的讨论,该方法被逐步转换为基于差分算子的框架。为了限制由此产生的过多可能的量化,需要出于简单性和可扩展性的额外假设。给出了圆周上的乘性差分算子和相应的q-Borel运动学及其N点离散;讨论了Witt代数与q-变形的关系。对于一个“自然”的选择的q-运动学相应的q-差分演化方程。这项研究表明,一般困难的物理理论从一个已知的一个“新”的框架。

英文摘要:

A formulation of quantum mechanics with additive and multiplicative (q-)difference operators instead of differential operators is studied from first principles. Borel-quantisation on smooth configuration spaces is used as guiding quantisation method. After a short discussion this method is translated step-by-step to a framework based on difference operators. To restrict the resulting plethora of possible quantisations additional assumptions motivated by simplicity and plausibility are required. Multiplicative difference operators and the corresponding q-Borel kinematics are given on the circle and its N-point discretisation; the connection to q-deformations of the Witt algebra is discussed. For a "natural" choice of the q-kinematics a corresponding q-difference evolution equation is obtained. This study shows general difficulties for a generalisation of a physical theory from a known one to a "new" framework.

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