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arXiv 2207.00399hep-th
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从Yang-Mills矩阵模型看宇宙时间演化与传播子

Cosmic time evolution and propagator from a Yang-Mills matrix model

Joanna L. Karczmarek, Harold C. Steinacker

AI总结:

研究IKKT型矩阵模型在1+1维Minkowski时空中的解,提出Lorentzian矩阵积分的$i\varepsilon$正则化,恢复Feynman传播子,揭示因果结构可从矩阵模型涌现。

摘要:

我们考虑了IKKT型矩阵模型的一个解,该解可视为具有Minkowski符号的1+1维时空,并带有大反弹奇点。我们提出了Lorentzian矩阵积分的适当$i\varepsilon$正则化,从而得到有效场论的标准$i\varepsilon$规定。特别地,在晚期局部地恢复了Feynman传播子。这表明因果结构和时间演化可以在矩阵模型中涌现,即使在非平凡几何上也是如此。我们还考虑了模式通过大反弹的传播,观察到反弹后与反弹前片层之间的有趣关联,这反映了目标空间中brane的结构。

英文摘要:

We consider a solution of a IKKT-type matrix model which can be considered as a 1+1-dimensional space-time with Minkowski signature and a Big Bounce-like singularity. A suitable $i\varepsilon$ regularization of the Lorentzian matrix integral is proposed, which leads to the standard $i\varepsilon$-prescription for the effective field theory. In particular, the Feynman propagator is recovered locally for late times. This demonstrates that a causal structure and time evolution can emerge in the matrix model, even on non-trivial geometries. We also consider the propagation of modes through the Big Bounce, and observe an interesting correlation between the post-BB and pre-BB sheets, which reflects the structure of the brane in target space.

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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