Kaluza–Klein-type models of de Sitter and Poincaré gauge theories of gravity
Kaluza–Klein-type models of de Sitter and Poincaré gauge theories of gravity
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DOI：
10.1088/0264-9381/30/14/145004
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发表时间：
2013-06
影响因子：
3.5
通讯作者：
Jia-An Lu;Chao-guang Huang
中科院分区：
文献类型：
--
作者：
Jia-An Lu;Chao-guang Huang
我们分别在de Sitter或Poincaré引力规范理论中用de Sitter或Minkowski丛构造了Kaluza-Klein型模型。一个明显的规范不变的形式主义已经给出。引力动力学是由de Sitter或Minkowski丛的几何和在规范不变形式中起重要作用的整体截面构成的。与旧的Kaluza-Klein型引力规范理论模型不同，我们的模型可以在拉格朗日量中得到一个合适的宇宙学项，并且在无自旋流和无挠率极限下的模型将回到具有相应宇宙学项的广义相对论。我们还将结果推广到了宇宙学项可变的情况。
We construct Kaluza–Klein-type models with a de Sitter or Minkowski bundle in the de Sitter or Poincaré gauge theory of gravity, respectively. A manifestly gauge-invariant formalism has been given. The gravitational dynamics is constructed by the geometry of the de Sitter or Minkowski bundle and a global section which plays an important role in the gauge-invariant formalism. Unlike the old Kaluza–Klein-type models of gauge theory of gravity, a suitable cosmological term can be obtained in the Lagrangian of our models and the models in the spin-current-free and torsion-free limit will come back to general relativity with a corresponding cosmological term. We also generalize the results to the case with a variable cosmological term.