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arXiv 2404.04519gr-qchep-thmath-phmath.MP
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$f(R,\square R)$引力及其与修正GUP标量场模型的等价性

$f(R,\square R)$-gravity and equivalency with the modified GUP Scalar field models

Andronikos Paliathanasis

AI总结:

本文研究六阶$f(R,\square R)$引力与二次GUP标量场模型的等价性,通过双标量场描述高阶导数自由度,并在无宇宙学常数下恢复de Sitter宇宙。

摘要:

受具有最小长度的标量场引力模型推广的启发,我们研究修正引力理论中的等价理论。二次型广义不确定原理(GUP)在应用中产生了变形Heisenberg代数,导致由高阶导数描述的额外自由度出现。这些新自由度可归因于一个新标量场的引入,从而将所得理论转化为一个双标量场理论。因此,为描述全部自由度,我们研究六阶修正$f(R,\square R)$引力理论的特殊形式,其引力Lagrangian具有与GUP标量场理论相似的性质。最后讨论了宇宙学应用,并证明无需引入宇宙学常数即可恢复de Sitter宇宙。

英文摘要:

Inspired by the generalization of scalar field gravitational models with a minimum length we study the equivalent theory in modified theories of gravity. The quadratic Generalized Uncertainty Principle (GUP) gives rise to a deformed Heisenberg algebra in the application, resulting in the emergence of additional degrees of freedom described by higher-order derivatives. The new degrees of freedom can be attributed to the introduction of a new scalar field, trasforming the resulting theory into a two-scalar field theory. Thus, in order to describe all the degrees of freedom we investigate special forms of the sixth-order modify $f\left( R,\square R\right) -$theory of gravity, where the gravitational Lagrangian has similar properties~to~that of the GUP scalar field theory. Finally, the cosmological applications are discussed, and we show that the de Sitter universe can be recovered without introducing a cosmological constant.

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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