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arXiv 0708.3428hep-th
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(1+1)维Dirichlet Casimir效应的新重整化方法

A new renormalization approach to the Dirichlet Casimir effect for ϕ^4 theory in (1+1) dimensions

Reza Moazzemi, Siamak S. Gousheh

摘要:

在一维空间中计算了$ϕ^4$理论中限制在两个平行平板之间的实标量场的次高阶Casimir效应。在这里,我们使用格林函数与狄利克雷边界条件的两个墙壁。在本文中,我们引入了一个系统的摄动展开,其中的反项自动变成与边界条件相一致。这将不可避免地导致物理量的非平凡位置依赖性,作为平移不变性被打破的表现。这与通常使用的反项相反,在具有非平凡边界条件的问题中,这些边界条件要么完全来自自由情况,要么最多只在边界处添加反项。我们获得了\emph{finite}结果的巨大和无质量的情况下,形成鲜明对比的一些其他报告的结果。其次,可能不太重要的是,除了通常的正则化和重正化程序之外,我们还使用了一个补充的重正化程序,这使得任何解析延拓技术的使用都是不必要的。

英文摘要:

The next to the leading order Casimir effect for a real scalar field, within $ϕ^4$ theory, confined between two parallel plates is calculated in one spatial dimension. Here we use the Green's function with the Dirichlet boundary condition on both walls. In this paper we introduce a systematic perturbation expansion in which the counterterms automatically turn out to be consistent with the boundary conditions. This will inevitably lead to nontrivial position dependence for physical quantities, as a manifestation of the breaking of the translational invariance. This is in contrast to the usual usage of the counterterms, in problems with nontrivial boundary conditions, which are either completely derived from the free cases or at most supplemented with the addition of counterterms only at the boundaries. We obtain \emph{finite} results for the massive and massless cases, in sharp contrast to some of the other reported results. Secondly, and probably less importantly, we use a supplementary renormalization procedure in addition to the usual regularization and renormalization programs, which makes the usage of any analytic continuation techniques unnecessary.

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