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arXiv 2103.04936gr-qchep-phhep-th
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非定域时空物质

Nonlocal Spacetime-Matter

Leonardo Modesto

摘要:

我们提出了一个在物质存在下的引力的非定域场论,它与微扰么正性、量子有限性和我们下面将要列出的其他基本经典性质相一致。首先,这个理论精确地再现了爱因斯坦引力与物质耦合的相同的树级散射振幅,确保不违反宏观因果关系。其次,爱因斯坦理论的所有精确解也是非局部理论的精确解。最后,也是最重要的,非局部引力(有或无物质)中精确解的线性和非线性稳定性分析与广义相对论中的相同分析是一一对应的。因此,在爱因斯坦理论中稳定的所有精确解在非局部引力中也是稳定的,只要存在任何微扰阶的物质。

英文摘要:

We propose a nonlocal field theory for gravity in presence of matter consistent with perturbative unitarity, quantum finiteness, and other essential classical properties that we are going to list below. First, the theory exactly reproduces the same tree-level scattering amplitudes of Einstein's gravity coupled to matter insuring no violation of macro-causality. Second, all the exact solutions of the Einstein's theory are also exact solutions of the nonlocal theory. Finally, and most importantly, the linear and nonlinear stability analysis of the exact solutions in nonlocal gravity (with or without matter) is in one to one correspondence with the same analysis in General Relativity. Therefore, all the exact solutions stable in the Einstein's theory are also stable in nonlocal gravity in presence of matter at any perturbative order.

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