gravity with spacetime torsion

IF 1.8 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

EPL Pub Date : 2024-07-30 DOI:10.1209/0295-5075/ad59bf

Hitender Kumar, Tanmoy Paul and Soumitra SenGupta

引用次数: 0

Abstract

The duality between a higher-curvature f(R) gravity model and a scalar-tensor theory helps to bring out the role of the additional degree of freedom originating from the higher-derivative terms in the gravity action. Such a degree of freedom which appears as a scalar field has been shown to have multiple implications in the cosmological/astrophysical scenario. The present work proposes a novel generalization to this correspondence between f(R) gravity and a dual scalar-tensor theory when the affine connection is considered to have an antisymmetric part. It turns out that the f(R) action in the presence of spacetime torsion can be recast to a coupled scalar-tensor theory with a 2-rank massless antisymmetric tensor field in the Einstein frame, where the scalar field gets coupled with the antisymmetric field through derivative coupling(s).

查看原文本刊更多论文

具有时空扭转的引力

高曲率 f(R)引力模型与标量张量理论之间的二元性有助于揭示引力作用中的高衍生项所产生的额外自由度的作用。这种以标量场形式出现的自由度已被证明在宇宙学/天体物理学场景中具有多重意义。当仿射连接被视为具有反对称部分时，本研究提出了对 f(R) 引力与二元标量张量理论之间这种对应关系的新概括。事实证明，存在时空扭转时的 f(R) 作用可以重铸为爱因斯坦框架中带有 2 级无质量反对称张量场的耦合标量-张量理论，其中标量场通过导数耦合与反对称场耦合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

EPL 物理-物理：综合

CiteScore

3.30

自引率

5.60%

发文量

332

审稿时长

1.9 months

期刊介绍： General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.