发表机构
Universidade Federal do ABC (UFABC); Universidade Federal da Paraíba; Universidade Federal do Ceará(阿巴克联邦大学; 帕拉伊巴联邦大学; 塞阿拉联邦大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文在 $f(Q,B)$ 引力标量表示中构造五维厚膜模型,通过辅助标量场和勒让德变换简化方程,研究两个渐近 AdS 厚膜解,并证明无质量引力子的局域化与稳定性。
AI 中文摘要
本文研究了 $f(Q,B)$ 引力标量表示中的余维一厚膜世界,其中 $Q$ 为非度规标量,$B$ 为满足 $R=Q-B$ 的边界项。我们将引力部分用两个辅助标量场 $\u03c6=f_Q$ 和 $\u03c8=f_B$ 以及由 $f(Q,B)$ 函数经勒让德变换得到的相互作用势 $U(\u03c6,\u03c8)$ 来表示。在重合规范下,并假设具有四维庞加莱对称性的五维翘曲几何,我们推导了由规范体标量场驱动的完整膜方程。为实现目标,我们研究了两个具有局域标量轮廓的光滑渐近 AdS 厚膜模型。此外,我们还分析了张量扰动,并证明了无质量引力子的局域化与稳定性。
英文摘要
One examines a codimension-one thick braneworld in the scalar representation of $f(Q,B)$ gravity, where $Q$ is the nonmetricity scalar, and $B$ is the boundary term satisfying $R=Q-B$. We write the gravitational sector in terms of two auxiliary scalar fields, $φ=f_Q$ and $ψ=f_B$, and an interaction potential $U(φ,ψ)$ obtained by a Legendre transformation from the $f(Q,B)$ function. Working in the coincident gauge and assuming a five-dimensional warped geometry with four-dimensional Poincaré symmetry, we derive the complete set of brane equations sourced by a canonical bulk scalar field. To accomplish our purpose, we address two models of smooth asymptotically AdS thick brane with localized scalar profiles. Furthermore, we also analyze tensor perturbations and demonstrate the localization and stability of the massless graviton.
Comments19 pages and 18 captioned figures