arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.06497hep-thgr-qc
收藏

标度因子自对偶宇宙模型

Scale Factor Self-Dual Cosmological Models

U. Camara dS, A. A. Lima, G. M. Sotkov

摘要:

我们实现了Friedmann-Robertson-Walker宇宙学模型的共形时标因子对偶,这与弱能量条件是一致的。对自对偶性的要求决定了一大类正压流体的状态方程。我们研究的例子充满了两个相互作用的流体,呈现出加速和减速的时期,与明显的UV/IR二元性的宇宙。相关的自对偶标量场相互作用原来是符合“辐射状”的修改Chaubergin气体模型。我们提出了一个等价的实现,他们作为规范凯勒西格玛模型(最低限度地耦合到重力)非常具体和相互关联的凯勒和超势。讨论了它们在描述山顶暴胀和作为晚期宇宙的精华模型中的应用。

英文摘要:

We implement a conformal time scale factor duality for Friedmann-Robertson-Walker cosmological models, which is consistent with the weak energy condition. The requirement for self-duality determines the equations of state for a broad class of barotropic fluids. We study the example of a universe filled with two interacting fluids, presenting an accelerated and a decelerated period, with manifest UV/IR duality. The associated self-dual scalar field interaction turns out to coincide with the "radiation-like" modified Chaplygin gas models. We present an equivalent realization of them as gauged Kähler sigma models (minimally coupled to gravity) with very specific and interrelated Kähler- and super-potentials. Their applications in the description of hilltop inflation and also as quintessence models for the late universe are discussed.

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。

↑