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arXiv 2104.03016astro-ph.COgr-qc
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暴胀前的约束量子初始条件

Constraining Quantum Initial Conditions before Inflation

T. Gessey-Jones, W. J. Handley

摘要:

我们从理论上和观测上研究不同的选择初始条件的原始模式的功能,在一个时代之前的通货膨胀。通过推导几种不同的量子真空处方所产生的可观测量的预测,我们证明了真空的某些选择在理论上是可以从观测上区分的。通过贝叶斯分析将这些预测与普朗克2018年的观测结果进行比较,没有明显的证据表明任何量子真空处方优于其他处方。此外,我们考虑冻结的初始条件,表示在大爆炸奇点的白噪声初始状态。在一定的假设下,宇宙学一致性模型和冻结初始条件对宇宙微波背景各向异性的预测是一致的。因此,冻结初始条件可能提供另一种理论范式来解释以前根据量子真空的膨胀理解的观测。

英文摘要:

We theoretically and observationally investigate different choices of initial conditions for the primordial mode function that are imposed during an epoch preceding inflation. By deriving predictions for the observables resulting from several alternate quantum vacuum prescriptions we show some choices of vacua are theoretically observationally distinguishable from others. Comparing these predictions to the Planck 2018 observations via a Bayesian analysis shows no significant evidence to favour any of the quantum vacuum prescriptions over the others. In addition we consider frozen initial conditions, representing a white-noise initial state at the big-bang singularity. Under certain assumptions the cosmological concordance model and frozen initial conditions are found to produce identical predictions for the cosmic microwave background anisotropies. Frozen initial conditions may thus provide an alternative theoretic paradigm to explain observations that were previously understood in terms of the inflation of a quantum vacuum.

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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