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arXiv 1104.1349hep-thastro-ph.COgr-qc
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FRW时空中超对称模型的真空涨落

Vacuum fluctuations in a supersymmetric model in FRW spacetime

Neven Bilic

摘要:

研究了膨胀FRW时空中的非相互作用超对称模型。软超对称破缺导致对真空能量密度的非零贡献。普朗克长度量级的短距离截断提供了一个与观测到的宇宙学常数相当的真空能量密度的尺度。假设除了场的真空涨落外,还存在一种暗能量物质,用自洽方法导出了一个有效的状态方程。有效状态方程对截止值的选择很敏感,但不需要微调。

英文摘要:

We study a noninteracting supersymmetric model in an expanding FRW spacetime. A soft supersymmetry breaking induces a nonzero contribution to the vacuum energy density. A short distance cutoff of the order of Planck length provides a scale for the vacuum energy density comparable with the observed cosmological constant. Assuming the presence of a dark energy substance in addition to the vacuum fluctuations of the field an effective equation of state is derived in a selfconsistent approach. The effective equation of state is sensitive to the choice of the cut-off but no fine tuning is needed.

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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