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arXiv 1003.3858hep-thastro-ph.COgr-qchep-ph
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引力和宇宙学中的暗旋量模型

Dark spinor models in gravitation and cosmology

Christian G. Boehmer, James Burnett, David F. Mota, Douglas J. Shaw

摘要:

我们介绍并仔细定义了一类基于非标准旋量的场论。它们的主要相互作用是通过引力场,这使得它们自然黑暗;我们称它们为暗旋子。我们提供了一个重要的分析,以前的建议,暗旋注意到,他们违反洛伦兹不变性。作为一个工作的假设,我们限制我们的分析,以非标准旋量保持洛伦兹不变性,同时是非本地的,并明确构建这样一个理论。我们构造了完整的能量动量张量,并通过假设一个特定的投影算子来显式地导出其分量。接下来自然要考虑宇宙学背景下的暗旋量。我们发现各种有趣的解决方案,旋量场导致慢卷和快卷德西特解决方案。我们还分析模型的旋量耦合共形重力,并考虑扰动和稳定的旋量。

英文摘要:

We introduce and carefully define an entire class of field theories based on non-standard spinors. Their dominant interaction is via the gravitational field which makes them naturally dark; we refer to them as Dark Spinors. We provide a critical analysis of previous proposals for dark spinors noting that they violate Lorentz invariance. As a working assumption we restrict our analysis to non-standard spinors which preserve Lorentz invariance, whilst being non-local and explicitly construct such a theory. We construct the complete energy-momentum tensor and derive its components explicitly by assuming a specific projection operator. It is natural to next consider dark spinors in a cosmological setting. We find various interesting solutions where the spinor field leads to slow roll and fast roll de Sitter solutions. We also analyse models where the spinor is coupled conformally to gravity, and consider the perturbations and stability of the spinor.

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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