A modified variational principle for gravity in the modified Weyl geometry
A modified variational principle for gravity in the modified Weyl geometry
复制标题
修正外尔几何中重力的修正变分原理
DOI:
10.1088/0264-9381/30/19/195008
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发表时间:
2013-01
影响因子:
3.5
通讯作者:
Huang Yong-Chang
中科院分区:
文献类型:
--
作者:
Yuan, Fang-Fang**;Huang Yong-Chang
The usual interpretation of the Weyl geometry is modified in two senses. First, both the additive Weyl connection and its variation are treated as (1, 2) tensors under the action of the Weyl covariant derivative. Second, a modified covariant derivative operator is introduced which still preserves the tensor structure of the theory. With its help, the Riemann tensor in the Weyl geometry can be written in a more compact form. We justify this modification in detail from several aspects and obtain some insights along the way. By introducing some new transformation rules for the variation of tensors under the action of the Weyl covariant derivative, we find a Weyl version of the Palatini identity for the Riemann tensor. To derive the energy–momentum tensor and equations of motion for gravity in the Weyl geometry, one naturally applies this identity at first, and then converts the variation of the additive Weyl connection to those of the metric tensor and Weyl gauge field. We also discuss possible connections to the current literature on the Weyl-invariant extension of massive gravity and the variational principles in f(R) gravity.
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DOI:
10.1142/s2010194511001115
发表时间:
2011-06
期刊:
arXiv: General Relativity and Quantum Cosmology
影响因子:
--
作者:
C. Romero;J. B. Fonseca-Neto;M. L. Pucheu
通讯作者:
C. Romero;J. B. Fonseca-Neto;M. L. Pucheu
影响因子:
5.4
作者:
Wei Li;Wei Song;A. Strominger
通讯作者:
Wei Li;Wei Song;A. Strominger
影响因子:
5
作者:
Suat Dengiz;Ercan Kilicarslan;B. Tekin
通讯作者:
Suat Dengiz;Ercan Kilicarslan;B. Tekin
DOI:
--
发表时间:
2012-06
期刊:
--
影响因子:
--
作者:
S. Faci
通讯作者:
S. Faci
影响因子:
3.3
作者:
R. Percacci
通讯作者:
R. Percacci