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arXiv 1412.6000gr-qchep-phhep-th
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量子引力的彩虹度规

Rainbow metric from quantum gravity

Mehdi Assanioussi, Andrea Dapor, Jerzy Lewandowski

摘要:

在这封信中,我们描述了从量子宇宙学模型中出现彩虹度规的一般机制。这个想法是基于量子时空上的QFT。在一般的假设下,我们发现场在其上传播的量子时空可以被经典时空所取代,经典时空的度规明确地取决于场的能量:正如色散关系的分析所示,不同能量的量子在不同的度规上传播,类似于折射材料中的光子(因此在文献中使用了“彩虹”的名字)。在推导这个结果时,我们没有考虑任何特定的量子引力理论:量子时空中高能粒子的定性行为只依赖于这样一个假设,即量子时空由希尔伯特空间$\mathcal{H}_G$中的波函数$Ψ_o$描述。

英文摘要:

In this letter, we describe a general mechanism for emergence of a rainbow metric from a quantum cosmological model. This idea is based on QFT on a quantum space-time. Under general assumptions, we discover that the quantum space-time on which the field propagates can be replaced by a classical space-time, whose metric depends explicitly on the energy of the field: as shown by an analysis of dispersion relations, quanta of different energy propagate on different metrics, similar to photons in a refractive material (hence the name "rainbow" used in the literature). In deriving this result, we do not consider any specific theory of quantum gravity: the qualitative behavior of high-energy particles on quantum space-time relies only on the assumption that the quantum space-time is described by a wave-function $Ψ_o$ in a Hilbert space $\mathcal{H}_G$.

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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