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arXiv 0812.3554gr-qc
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圈量子引力中的准局域能

Quasi-Local Energy in Loop Quantum Gravity

Jinsong Yang, Yongge Ma

摘要:

虽然在广义相对论中没有已知的关于引力场能量密度的有意义的概念,但已经提出了一些与扩展但有限区域相关的准局部引力能的概念。本文在圈量子引力的框架下研究了准定域能的概念,以考察这些概念能否在量子水平上实现。对两个基本的准定域几何量进行量子化,得到了圈量子引力运动学希尔伯特空间中定义良好的算符。然后,我们使用它们作为基本的积木来构建不同版本的准本地能量运营商。分别得到了Brown-York能量、Liu-Yau能量、Hawking能量和Geroch能量对应的算符。Geroch能量算符的优点有助于我们从圈量子引力中导出一个较一般的熵-面积关系,从而导出一个全息原理。

英文摘要:

Although there is no known meaningful notion of the energy density of the gravitational field in general relativity, a few notions of quasi-local energy of gravity associated to extended but finite domains have been proposed. In this paper, the notions of quasi-local energy are studied in the framework of loop quantum gravity, in order to see whether these notions can be carried out at quantum level. Two basic quasi-local geometric quantities are quantized, which lead to well-defined operators in the kinematical Hilbert space of loop quantum gravity. We then use them as basic building blocks to construct different versions of quasi-local energy operators. The operators corresponding to Brown-York energy, Liu-Yau energy, Hawking energy, and Geroch energy are obtained respectively. The virtue of the Geroch energy operator is beneficial for us to derive a rather general entropy-area relation and thus a holographic principle from loop quantum gravity.

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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