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arXiv 1012.1175astro-ph.COhep-th
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来自膨胀异常的耦合暗能量和暗物质

Coupled dark energy and dark matter from dilatation anomaly

Joschka Beyer, Sami Nurmi, Christof Wetterich

摘要:

宇宙学逃逸解在无限时间的渐近极限下可能表现出精确的膨胀对称性。在这个极限中,无质量的介子或宇宙子可能伴随着另一个无质量的标量场--几何子。在有限时间内,由于不完美的膨胀对称性,宇宙子和子的小的依赖时间的质量仍然存在。当质量足够大时,geon将开始振荡并扮演暗物质的角色,而宇宙子则负责产生暗能量。两个场的质量的共同起源导致了暗物质和暗能量之间的有效相互作用。现实的宇宙学是可能的一个简单形式的有效cosmon-geon-potential。我们发现一个逆几何质量的大小,它可以减少亚星系结构的形成。

英文摘要:

Cosmological runaway solutions may exhibit an exact dilatation symmetry in the asymptotic limit of infinite time. In this limit, the massless dilaton or cosmon could be accompanied by another massless scalar field - the geon. At finite time, small time-dependent masses for both the cosmon and geon are still present due to imperfect dilatation symmetry. For a sufficiently large mass the geon will start oscillating and play the role of dark matter, while the cosmon is responsible for dark energy. The common origin of the mass of both fields leads to an effective interaction between dark matter and dark energy. Realistic cosmologies are possible for a simple form of the effective cosmon-geon-potential. We find an inverse geon mass of a size where it could reduce subgalactic structure formation.

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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