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arXiv 2011.10982gr-qc
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在具有二次非度量性和曲率的二维时空中耦合到 Dirac 场的修正引力模型

A modified gravity model coupled to a Dirac field in 2D spacetimes with quadratic nonmetricity and curvature

Caglar Pala, Ertan Kok, Ozcan Sert, Muzaffer Adak

AI总结:

本文构建二维中含二次非度量性及线性、二次曲率项的修正引力 Lagrangian 量,最小耦合 Dirac 旋量场,导出场方程并研究真空解与特定背景下的 Dirac 方程解。

摘要:

在总结了外代数的基本概念之后,我们首先讨论底流形上丛的规范结构,以便确定任意维度下总 Lagrangian 量中引力部分的形式。随后,我们在二维情形中将一个 Dirac 旋量场以最小方式耦合到我们的引力 Lagrangian 2-形式;该形式关于非度量性是二次的,并且关于曲率既是线性的又是二次的。接着,我们通过让总 Lagrangian 量对独立变量变分而得到场方程。最后,我们找到真空理论的若干类解,然后找到 Dirac 方程在一个特定背景中的一个解,并对它们进行分析。

英文摘要:

After summarizing basic concepts for the exterior algebra we firstly discuss the gauge structure of the bundle over base manifold for deciding the form of the gravitational sector of the total Lagrangian in any dimensions. Then we couple minimally a Dirac spinor field to our gravitational Lagrangian 2-form which is quadratic in the nonmetricity and both linear and quadratic in the curvature in two dimensions. Subsequently we obtain field equations by varying the total Lagrangian with respect to the independent variables. Finally we find some classes of solutions of the vacuum theory and then a solution of the Dirac equation in a specific background and analyse them.

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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