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arXiv 0810.1224quant-phhep-th
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非对易量子力学:泛函描述的唯一性

Noncommutative quantum mechanics: uniqueness of the functional description

F. S. Bemfica, H. O. Girotti

摘要:

指数为$α$的广义Weyl变换用于实现非对易量子力学情况下产生费曼核的相空间路径积分的时间片定义。正如预期的那样,费曼核的这种表示不是唯一的,而是由实参数$α$标记的。我们成功地证明,$α$依赖的贡献消失的限制,时间片为零。这种一致性的证明是复杂的,因为哈密顿量涉及来自非交换性的非交换算子的乘积。非交换性矩阵的反对称性在$α$相关项的消去机制中起着关键作用。

英文摘要:

The generalized Weyl transform of index $α$ is used to implement the time-slice definition of the phase space path integral yielding the Feynman kernel in the case of noncommutative quantum mechanics. As expected, this representation for the Feynman kernel is not unique but labeled by the real parameter $α$. We succeed in proving that the $α$-dependent contributions disappear at the limit where the time slice goes to zero. This proof of consistency turns out to be intricate because the Hamiltonian involves products of noncommuting operators originating from the non-commutativity. The antisymmetry of the matrix parameterizing the non-commutativity plays a key role in the cancelation mechanism of the $α$-dependent terms.

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