定义框架下的非最小耦合暖暴胀
Non-Minimally Coupled Warm Inflation in the Defining Frame
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中文总结 AI 辅助
本文在定义框架下研究F(Φ)R标量张量引力中的暖暴胀，发现修正引力会抑制耗散比，两框架耗散区域不重合，量子扰动可在定义框架高温强耗散区主导热涨落，还计算了相关宇宙学参数并给出符合CMB约束的基准点。
中文摘要 AI 辅助
本文在“定义”框架下研究了$F(Φ)R$标量张量引力理论中的暖暴胀，该框架下明确了理论形式及其参数取值。将所得动力学转换到爱因斯坦框架后，我们发现耗散比会被修正引力效应抑制。因此，尽管有效暖暴胀动力学可在任一框架中得到一致分析，但两个框架下的耗散区域并不一定重合。特别地，我们发现即使在定义框架的高温强耗散区域，标量功率谱中量子扰动仍可能主导热涨落。最后，我们针对非最小耦合函数$F(Φ) = 1+ξ(Φ/m_{\rm P})^2$、四次势以及常数和二次场依赖耗散系数的情况，计算了标量谱指数和张标比，并确定了符合当前CMB约束的基准点。
英文摘要
Warm inflation in $F(Φ)R$ scalar-tensor theories of gravity is investigated in the `defining' frame, where the theory and its parameter values are specified. Translating the resulting dynamics to the Einstein frame, we find that the dissipation ratio is suppressed by the modified-gravity effects. Thus, although the effective warm-inflation dynamics can be consistently analysed in either frame, the dissipative regimes need not coincide between them. In particular, we find that quantum perturbations can dominate over thermal fluctuations in the scalar power spectrum even in a high-temperature, strong-dissipation regime in the defining frame. Finally, we compute the scalar spectral index and tensor-to-scalar ratio for a non-minimal coupling function $F(Φ) = 1+ξ(Φ/m_{\rm P})^2$ with a quartic potential and both constant and quadratic field-dependent dissipation coefficients, and identify benchmark points compatible with current CMB constraints.
