空间平坦FLRW时空与大爆炸从矩阵几何

IF 2.5 3区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

Nuclear Physics B Pub Date : 2025-06-19 DOI:10.1016/j.nuclphysb.2025.116988

Christian Gaß, Harold C. Steinacker

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引用次数: 0

摘要

我们提出了一个膨胀的，空间平坦的（k=0） FLRW量子时空与大爆炸，被认为是在杨-米尔斯矩阵模型的背景。FLRW几何以模糊双曲面的投影形式出现在半经典极限中。我们分析了标量场的传播，并证明了它们的费曼传播子类似于半经典状态下的Minkowski空间费曼传播子。此外，还明确地描述了由矩阵模型预测的高自旋模式。这些结果与最近在具有大弹跳的k=−1 FLRW量子时空上的结果进行了比较。

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Spatially flat FLRW spacetimes with a Big Bang from matrix geometry

We present an expanding, spatially flat (

k = 0

) FLRW quantum spacetime with a Big Bang, considered as a background in Yang-Mills matrix models. The FLRW geometry emerges in the semi-classical limit as a projection from the fuzzy hyperboloid. We analyze the propagation of scalar fields, and demonstrate that their Feynman propagator resembles the Minkowski space Feynman propagator in the semi-classical regime. Moreover, the higher spin modes predicted by the matrix model are described explicitly. These results are compared to recent results on

k = - 1

FLRW quantum spacetimes with a Big Bounce.

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来源期刊

Nuclear Physics B 物理-物理：粒子与场物理

CiteScore

5.50

自引率

7.10%

发文量

302

审稿时长

1 months

期刊介绍： Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.