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arXiv 2302.02584astro-ph.CO
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通过原初扰动的量子特征区分宇宙学模型

Distinguishing cosmological models through quantum signatures of primordial perturbations

Rathul Nath Raveendran, Sumanta Chakraborty

AI总结:

本研究通过积分消去多场暴胀模型的不可观测熵扰动,对比不同暴胀模型的曲率扰动量子特征,发现即使大尺度功率谱相同,不同模型的量子特征仍存在差异,可用于区分暴胀模型且结论可推广至反弹场景。

摘要:

我们通过积分消去多场暴胀模型中不可观测的熵扰动,研究曲率扰动的多种量子性度量的演化。具体而言,我们讨论以下量子性度量,即纯度、纠缠熵和量子失谐。本研究中考虑的模型,是能产生与单场暴胀模型所产生的大尺度曲率功率谱相似的模型。更具体地说,我们考察了不同的多场模型,它们能产生近标度不变且振荡的曲率功率谱,并将其扰动中的量子特征与对应的单场模型进行比较。我们发现,尽管不同的暴胀模型可能在大尺度上产生相同的可观测功率谱,但它们具有由扰动模式产生的不同量子特征。这或许提供了一种基于量子特征来区分不同暴胀模型的方法。有趣的是,这一结果也可推广到反弹宇宙学场景中。

英文摘要:

We study the evolution of various measures of quantumness of the curvature perturbation by integrating out the inaccessible entropic fluctuations in the multi-field models of inflation. In particular, we discuss the following measures of quantumness, namely purity, entanglement entropy and quantum discord. The models being considered in this work are ones that produce large scale curvature power spectra similar to those produced by single-field models of inflation. More specifically, we consider different multi-field models which generate nearly scale invariant and oscillatory curvature power spectrum and compare their quantum signatures in the perturbations with the corresponding single-field models. We find that, even though different models of inflation may produce the same observable power spectrum on large scales, they have distinct quantum signatures arising from the perturbation modes. This may allow for a way to distinguish between different models of inflation based on their quantum signatures. Intriguingly, this result generalizes to bouncing scenarios as well.

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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