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alpha-Vacuum decay and linear equation of state cosmology.

机译：α-真空衰减和状态宇宙线性方程。

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摘要

This work is divided into two parts. The first addresses formal aspects of field theory in de Sitter space which are relevant to inflation while the second is a phenomenological model of dark energy and matter relevant to the evolution of structure and expansion of the universe.; In the first part we consider the decay of the inflaton into scalars paying particular attention to the vacuum structure that arises in de Sitter space. Before presenting the details of particle decay in de Sitter space we outline a general proof of the vacuum structure that exists in curved spaces that is absent in Minkowski in order to demonstrate that the issues are not limited to idealized de Sitter. We also consider a time ordering prescription that apparently eliminates the dependence of the decay rate on the vacuum choice. Finally we consider the implications of these results and ask whether they indicate a possible resolution of vacuum ambiguity.; The second part considers an alternative to the concordance ΛCDM model cosmology. We replace the cosmological constant and some portion of the CDM component by a fluid that exhibits a linear equation of state (one that is in fact appropriate to liquids). We then fit this model to cosmological observations of the expansion, microwave background and matter power spectrum. We find that the model potentially unifies dark matter and energy and we even consider micro-physical Lagrangians that would give rise to this linear equation of state.
机译：这项工作分为两个部分。第一个是在德西特空间中论及与通货膨胀有关的场论形式方面，第二个是暗能量和与宇宙结构演化和膨胀有关的物质的现象学模型。在第一部分中，我们考虑了充气子衰减为标量的过程，并特别注意de Sitter空间中出现的真空结构。在介绍de Sitter空间中的粒子衰减的详细信息之前，我们概述了Minkowski中不存在的弯曲空间中存在的真空结构的一般证明，以证明问题不仅仅限于理想化的de Sitter。我们还考虑了一种定时订购处方，该处方显然消除了衰减速率对真空选择的依赖性。最后，我们考虑这些结果的含义，并询问它们是否表明可以解决真空歧义问题。第二部分考虑了一致性ΛCDM模型宇宙学的替代方法。我们用呈现线性状态方程的流体（实际上适合于液体）代替宇宙常数和CDM组件的某些部分。然后，我们将该模型拟合到膨胀，微波背景和物质功率谱的宇宙学观测。我们发现该模型有可能统一暗物质和能量，并且甚至考虑了微物理拉格朗日方程，这些拉格朗日方程会引起状态线性方程。

著录项

  • 作者

    Naidu, Siddartha.;

  • 作者单位

    Carnegie Mellon University.;

  • 授予单位 Carnegie Mellon University.;
  • 学科 Physics Astronomy and Astrophysics.; Physics Elementary Particles and High Energy.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 73 p.
  • 总页数 73
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学;高能物理学;
  • 关键词

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