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arXiv 1206.3497gr-qchep-th
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Plebanski公式中的引力和镜像引力

Gravity and Mirror Gravity in Plebanski Formulation

D. L. Bennett, L. V. Laperashvili, H. B. Nielsen, A. Tureanu

摘要:

我们提出了几个四维引力理论的普列班斯基公式,其中的四分体和连接是独立的动力学变量。我们考虑不同版本的引力理论之间的关系:爱因斯坦,对偶,“镜像”引力和扭转引力。根据普列班斯基的假设,我们生活的世界是由自对偶左手引力描述的。我们提出,如果自然界中存在镜像世界,那么“镜像引力”就是具有破镜宇称的右手反自对偶引力。考虑一种特殊的Riemann-Cartan时空,它具有挠率作为附加的几何性质,我们证明了在Plebanski公式中,引力的普通扇区和对偶扇区以及具有挠率的引力是等价的。在这种背景下,我们还发展了一种"纯联系引力"--一种引力的同态不变规范理论。我们计算了这个四维引力的配分函数和有效拉格朗日量,并研究了这个理论在小距离上的极限。

英文摘要:

We present several theories of four-dimensional gravity in the Plebanski formulation, in which the tetrads and the connections are the independent dynamical variables. We consider the relation between different versions of gravitational theories: Einstenian, dual, 'mirror' gravities and gravity with torsion. According to Plebanski's assumption, our world, in which we live, is described by the self-dual left-handed gravity. We propose that if the Mirror World exists in Nature, then the 'mirror gravity' is the right-handed anti-self-dual gravity with broken mirror parity. Considering a special version of the Riemann--Cartan space-time, which has torsion as additional geometric property, we have shown that in the Plebanski formulation the ordinary and dual sectors of gravity, as well as the gravity with torsion, are equivalent. In this context, we have also developed a 'pure connection gravity' -- a diffeomorphism-invariant gauge theory of gravity. We have calculated the partition function and the effective Lagrangian of this four-dimensional gravity and have investigated the limit of this theory at small distances.

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