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arXiv 2302.11528gr-qchep-th
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德西特背景上非线性 sigma 模型中未完成的工作

Unfinished Business in A Nonlinear Sigma Model on de Sitter Background

R. P. Woodard, B. Yesilyurt

AI总结:

本文针对德西特背景上的非线性 sigma 模型,补全了背景两圈演化与单圈 beta 函数两项未完成的分析,完善了对大时空对数的重求和研究。

摘要:

德西特背景上的非线性 sigma 模型具有与引力相同类型的导数相互作用,并在关联函数和有效场方程的解中表现出同种的大时空对数。最近有工作证明,通过将 Starobinsky 随机形式的一种变体与重整化群的一种变体相结合,可以对这些对数进行重求和。本文考虑其中一个模型,并完成两项此前未完成的分析:背景在两圈阶的演化以及单圈 beta 函数。

英文摘要:

Nonlinear sigma models on de Sitter background possess the same kind of derivative interactions as gravity, and show the same sorts of large spacetime logarithms in correlation functions and solutions to the effective field equations. It was recently demonstrated that these logarithms can be resummed by combining a variant of Starobinsky's stochastic formalism with a variant of the renormalization group. This work considers one of these models and completes two pieces of analysis which were left unfinished: the evolution of the background at two loop order and the one loop beta function.

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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