arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2503.03349gr-qc
收藏

多项式吸引子模型下暴胀退相干的观测约束

Observational constraints on inflationary decoherence with polynomial attractor model

Zhongkai Wang, Yungui Gong

AI总结:

本文利用Lindblad方程研究了包含超慢滚阶段的多项式吸引子模型中的暴胀量子退相干过程,数值计算发现退相干主要在极大尺度上显著修正曲率功率谱并产生峰值,结合谱指数和张标比的观测约束,推导了相互作用参数的取值范围。

摘要:

暴胀扰动的量子到经典转变仍是一个未解决的基本问题,量子退相干是很有前景的解决方案之一。通过将暴胀期间的量子扰动视为与其环境相互作用的开放量子系统,量子退相干可以用 Lindblad 方程来描述。这一形式体系改变了原初量子扰动的演化,从而改变了曲率扰动的功率谱,并产生可观测效应。本文研究了包含超慢滚阶段的多项式吸引子模型的退相干过程,扩展了先前仅限于慢滚情景的分析。我们数值计算了由量子退相干引起的功率谱修正,结果表明仅在极大尺度上有显著改变,且在功率谱极小值处由退相干修正产生了一个峰值。利用对标量谱指数和张标比的观测约束,并要求相关尺度在暴胀结束时实现完全退相干,我们得到了相互作用参数的约束:$10^{-17}\ ext{Mpc}^{-1}<k_γ<0.061\ ext{Mpc}^{-1}$。

英文摘要:

The quantum-to-classical transition of inflationary perturbations remains an unresolved fundamental problem, and quantum decoherence is one of the promising solutions. By considering quantum perturbations during inflation as an open quantum system interacting with its environment, quantum decoherence can be described by the Lindblad equation. This formalism modifies the evolution of primordial quantum perturbations and consequently alters the power spectrum of curvature perturbations, leading to observable consequences. In this paper, we examine the decoherence process of a polynomial attractor model featuring an ultra-slow-roll stage, extending previous analyses limited to slow-roll scenarios. We numerically compute the correction to the power spectrum due to quantum decoherence, and the results show significant modification only on large scales, with a peak generated by the decoherence correction at the minimum of the power spectrum. Using observational constraints on the scalar spectral index and the tensor-to-scalar ratio, and requiring complete decoherence for relevant scales by the end of inflation, we obtain the constraint on the interaction parameter as $10^{-17}\text{Mpc}^{-1}<k_γ<0.061\text{Mpc}^{-1}$.

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。

↑