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arXiv 0709.0015gr-qc
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非对易爱因斯坦方程

Noncommutative Einstein Equations

Guglielmo Fucci, Ivan G. Avramidi

摘要:

研究了广义相对论的一种非对易变形,其中引力场由矩阵值对称双张量场描述。运动方程是在这个新理论的框架下,通过改变一个矩阵值标量曲率构造的规范不变作用量和一个矩阵值标量曲率构造的规范不变作用量导出的。有趣的是,动力学方程真正的非对易部分,仅仅是用一个在对易极限中完全消失的张量密度来描述的。研究了物质场能量动量张量的非对易推广。

英文摘要:

We study a noncommutative deformation of general relativity where the gravitational field is described by a matrix-valued symmetric two-tensor field. The equations of motion are derived in the framework of this new theory by varying a diffeomorphisms and gauge invariant action constructed by using a matrix-valued scalar curvature. Interestingly the genuine noncommutative part of the dynamical equations is described only in terms of a particular tensor density that vanishes identically in the commutative limit. A noncommutative generalization of the energy-momentum tensor for the matter field is studied as well.

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。

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