arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.07055gr-qcastro-ph.COhep-th
收藏

寻找动力学牛顿或普朗克常量的失迹法

Losing the trace to find dynamical Newton or Planck constants

Pavel Jiroušek, Keigo Shimada, Alexander Vikman, Masahide Yamaguchi

摘要:

我们表明,促进爱因斯坦方程的跟踪部分,一个平凡的身份的结果在牛顿常数是一个积分常数。因此,在这个公式中,牛顿常数是一个全局动力学自由度,也是量子化和量子涨落的对象。这与单模引力中的宇宙学常数的情况类似,在单模引力中,爱因斯坦方程的迹部分以不同的方式丢失。我们介绍了这些修改后的爱因斯坦方程的约束变分公式。然后,借鉴类比与单模引力的Henneaux-Teitelboim行动,我们构建不同的一般协变行动,导致这些动态。动力学牛顿常数的逆正则共轭到时空积分的里奇标量。令人惊奇的是,人们可以用动力学普朗克常量来代替动力学牛顿常数来表述一个等价的理论。最后,我们证明了类轴子场可以起到引力牛顿常数甚至量子普朗克常量的作用。

英文摘要:

We show that promoting the trace part of the Einstein equations to a trivial identity results in the Newton constant being an integration constant. Thus, in this formulation the Newton constant is a global dynamical degree of freedom which is also a subject to quantization and quantum fluctuations. This is similar to what happens to the cosmological constant in the unimodular gravity where the trace part of the Einstein equations is lost in a different way. We introduce a constrained variational formulation of these modified Einstein equations. Then, drawing on analogies with the Henneaux-Teitelboim action for unimodular gravity, we construct different general-covariant actions resulting in these dynamics. The inverse of dynamical Newton constant is canonically conjugated to the Ricci scalar integrated over spacetime. Surprisingly, instead of the dynamical Newton constant one can formulate an equivalent theory with a dynamical Planck constant. Finally, we show that an axion-like field can play a role of the gravitational Newton constant or even of the quantum Planck constant.

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。

↑