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arXiv 0903.5508gr-qchep-thmath-phmath.MP
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含时质量$S^1$上自由标量场Fock量子化的唯一性

Uniqueness of the Fock quantization of a free scalar field on $S^1$ with time dependent mass

Jerónimo Cortez, Guillermo A. Mena Marugán, Rogério Serôdio, José M. Velhinho

摘要:

我们分析了一个自由的标量场的量子描述的存在下,一个明确的时间相关的潜力,也解释为时间相关的质量的圆。经典地,场满足形式为$\ddotξ-ξ"+f(t)ξ=0$的线性波动方程。我们证明了对应于无质量自由场($f=0$)的特定情况下的正则对易关系的表示提供了足够一般的质量项$f(t)$的动力学的酉实现。此外,这种表示是唯一指定的,在一类表示确定的$S^1$不变的复杂结构,作为唯一一个允许一个单一的动态。这些结论实际上可以推广到具有轴对称性的双球面上的场。这概括了以前获得的唯一性结果的上下文中的量子场描述的高迪宇宙学,在线性极化的情况下,任何可能的拓扑结构的空间部分。

英文摘要:

We analyze the quantum description of a free scalar field on the circle in the presence of an explicitly time dependent potential, also interpretable as a time dependent mass. Classically, the field satisfies a linear wave equation of the form $\ddotξ-ξ"+f(t)ξ=0$. We prove that the representation of the canonical commutation relations corresponding to the particular case of a massless free field ($f=0$) provides a unitary implementation of the dynamics for sufficiently general mass terms, $f(t)$. Furthermore, this representation is uniquely specified, among the class of representations determined by $S^1$-invariant complex structures, as the only one allowing a unitary dynamics. These conclusions can be extended in fact to fields on the two-sphere possessing axial symmetry. This generalizes a uniqueness result previously obtained in the context of the quantum field description of the Gowdy cosmologies, in the case of linear polarization and for any of the possible topologies of the spatial sections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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