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arXiv 2211.01546gr-qcastro-ph.COhep-th
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超弦激发的对Starobinsky暴胀模型的量子修正

On the superstring-inspired quantum correction to the Starobinsky model of inflation

Sergei V. Ketov, Ekaterina O. Pozdeeva, Sergey Yu. Vernov

摘要:

超弦/M理论是量子引力的理论,它可以为可行的暴胀模型提供UV完备性。我们通过加入贝尔-罗宾逊张量$T^{μνλρ}$平方项来修正Starobinsky暴胀模型,该项是由超弦理论启发提出的主要量子修正。所考虑的$(R+\frac{1}{6m^2}R^2 -\fracβ{8m^6}T^2)$模型有两个参数:暴胀子质量$m$和弦激发的正参数$β$。我们导出了Friedmann-Lemaitre-Robertson-Walker宇宙中的运动方程并研究了它的解。我们发现的物理界限的参数$β$的值,要求没有鬼和一致性的推导出的暴胀观测与测量的宇宙微波背景辐射。

英文摘要:

Superstring/M-theory is the theory of quantum gravity that can provide the UV-completion to viable inflation models. We modify the Starobinsky inflation model by adding the Bel-Robinson tensor $T^{μνλρ}$ squared term proposed as the leading quantum correction inspired by superstring theory. The $(R+\frac{1}{6m^2}R^2 -\fracβ{8m^6}T^2)$ model under consideration has two parameters: the inflaton mass $m$ and the string-inspired positive parameter $β$. We derive the equations of motion in the Friedmann-Lemaitre-Robertson-Walker universe and investigate its solutions. We find the physical bounds on the value of the parameter $β$ by demanding the absence of ghosts and consistency of the derived inflationary observables with the measurements of the cosmic microwave background radiation.

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