arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0705.2200hep-thgr-qc
收藏

欧几里德时空中量子规范理论的有效引力

Effective gravity from a quantum gauge theory in Euclidean space-time

R. F. Sobreiro, V. J. Vasquez Otoya

摘要:

我们考虑一个欧几里德$d$维时空中的$SO(d)$规范理论,已知它在$2\le{d}\le4$的微扰论中可以重整化到所有阶。然后,借助于规范群的时空表示,将规范理论映射到具有线性连接的弯曲时空中。此外,在这种映射中,规范场扮演着弯曲时空的线性连接的角色,有效的度规张量自然地从这种映射中产生。得到的行动,是二次的黎曼-克里斯托弗张量,乍一看,破坏了重力解释的模型。因此,我们提供了一个机制,打破了$SO(d)$颜色不变性,并产生爱因斯坦-希尔伯特项,以及一个宇宙学常数项,允许解释的模型作为一个修改后的重力在帕拉蒂尼形式主义的草图。在这个意义上,引力可以被看作是一个有效的经典理论,起源于一个定义良好的量子规范理论。我们还表明,在四维的情况下,两种可能性的特殊解决方案的场方程是德西特和反德西特时空。

英文摘要:

We consider a $SO(d)$ gauge theory in an Euclidean $d$-dimensional space-time, which is known to be renormalizable to all orders in perturbation theory for $2\le{d}\le4$. Then, with the help of a space-time representation of the gauge group, the gauge theory is mapped into a curved space-time with linear connection. Further, in that mapping the gauge field plays the role of the linear connection of the curved space-time and an effective metric tensor arises naturally from the mapping. The obtained action, being quadratic in the Riemann-Christoffel tensor, at a first sight, spoils a gravity interpretation of the model. Thus, we provide a sketch of a mechanism that breaks the $SO(d)$ color invariance and generates the Einstein-Hilbert term, as well as a cosmological constant term, allowing an interpretation of the model as a modified gravity in the Palatini formalism. In that sense, gravity can be visualized as an effective classical theory, originated from a well defined quantum gauge theory. We also show that, in the four dimensional case, two possibilities for particular solutions of the field equations are the de Sitter and Anti de Sitter space-times.

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。

↑