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arXiv 2406.03395astro-ph.COgr-qchep-th
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近期DESI重子声学振荡测量能否容纳负的宇宙学常数？

Can recent DESI BAO measurements accommodate a negative cosmological constant?

Hao Wang, Ze-Yu Peng, Yun-Song Piao

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7 pages, 4 figures
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AI总结：

该研究结合DESI重子声学振荡等多类宇宙学数据搜寻负宇宙学常数，虽未找到其存在的证据，但发现大于68%置信水平下负宇宙学常数更受青睐的迹象，凸显了未来巡天的相关探测潜力。

摘要：

对应负宇宙学常数（CC）的反德西特真空在理论上十分重要且具备充分的理论依据，但其是否真实存在始终是一个有争议的问题。本文中，我们结合最新的暗能量光谱仪（DESI）重子声学振荡测量数据、普朗克宇宙微波背景数据以及Pantheon Plus超新星数据，开展负宇宙学常数的搜寻工作。尽管我们未发现负宇宙学常数存在的证据，但观测到了相关迹象：负宇宙学常数在大于68%的置信水平下更受青睐，且这类负宇宙学常数可使与之共存的演化暗能量组分的状态方程满足w≥-1。本工作凸显了即将开展的宇宙学巡天在搜寻负宇宙学常数方面的潜力。

英文摘要：

Anti-de Sitter vacuum, which correspond to a negative cosmological constant (CC), is theoretically important and well-motivated. However, whether it exists in reality or not has always been a controversial issue. In this paper, we perform the search for the negative CC using recent Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillation measurements combined with Planck cosmic microwave background and Pantheon Plus supernova data. Though we did not find the evidence for negative CC, we observed the indication for it, the negative CC is preferred at $>68\%$ significance level, while such a negative CC can make the state equation of evolving dark energy component (coexisting with negative CC) $w\geqslant -1$. Our work highlights the potential of upcoming cosmological surveys to search for the negative CC.

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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