General-Relativistic Covariance

General-Relativistic Covariance
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DOI:
10.1007/s10701-019-00256-0
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发表时间:
2020-04-01
影响因子:
1.5
通讯作者:
Dewar, Neil
Dewar, Neil
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Dewar, Neil

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这是一篇关于一般协方差的文章,以及它对时空结构的说明(或没有说明)。在概述了时空理论的动力学方法的一个版本,以及它如何努力处理一般协变理论之后,我认为我们应该在一般协变理论中与非一般协变理论中以相当不同的方式思考时空的对称结构:即,作为一种内部而不是外部对称结构的形式。
This is an essay about general covariance, and what it says (or doesn't say) about spacetime structure. After outlining a version of the dynamical approach to spacetime theories, and how it struggles to deal with generally covariant theories, I argue that we should think about the symmetry structure of spacetime rather differently in generally-covariant theories compared to non-generally-covariant theories: namely, as a form of internal rather than external symmetry structure.