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arXiv 0905.1615hep-thgr-qc
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存在整体扰动时de Sitter时空中标量场的真空极化

Vacuum polarization by a scalar field in de Sitter spacetime in the presence of global monopole

E. R. Bezerra de Mello

摘要:

本文分析了在整体非线性情况下,高维de Sitter空间中与大质量标量量子场相关的真空极化效应。由于这种分析是在纯de Sitter空间中进行的,因此我们在这里主要关注的是由全局空间的存在引起的效应。因此,为了实现这一目标,我们计算相应的Wightman函数,该函数以积分表示形式表示,并明确取决于与宇宙常数和宇宙学常数的存在相关的参数。承认前者接近于统一,这对应于大统一理论预测的现实值,可以将该函数表示为两项之和:第一项对应于不存在整体量子点的体上的怀特曼函数,第二项是量子点存在引起的贡献。

英文摘要:

In this paper we analyse the vacuum polarization effects associated with massive scalar quantum fields in a higher-dimensional de Sitter space in the presence of a global monopole. Because this analysis has been developed in a pure de Sitter space, here we are mainly interested on the effects induced by the presence of the global monopole. So, in order to achieve this objective we calculate the corresponding Wightman function, which is expressed in an integral representation and explicitly depends on the parameters associated with the presence of the monopole and the cosmological constant. Admitting that the former is closed to the unity, which corresponds to a realistic value predicted by Grand Unified Theories, it is possible to express this function as the sum of two terms: the first one corresponds to the Wightman function on the bulk where the global monopole is absent, and the second one is a contribution induced by the presence of the monopole.

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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