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Dark Energy Model with non-minimal coupling and Cosmological Constant Boundary

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Communications in Theoretical Physics 2011年第12期56卷 1167-1170页

作者：张晓菲 Department of Physics and Electronics Science Institute of Theoretical Physics Binzhou University

In this paper,we study a kind of dark energy models in the framework of the non-minimal *** this kind of models,dark energy could cross the cosmological constant boundary,and at early time,dark energy could have 'trac... 详细信息

关键词： dark energy model non-minimal coupling

Novel Rotating Hairy Black Hole in (2 + 1) Dimensions

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Communications in Theoretical Physics 2014年第4期61卷 475-481页

作者：赵柳徐伟祝斌 School of Physics Nankai University

We present some novel rotating hairy black hole metric in （2 ＋ 1） dimensions, which is an exact solution to the field equations of the Einstein-scalar-AdS theory with a non-minimal coupling. The scalar potential is determined by the metric ansatz and consistency of the field equations and cannot be prescribed arbitrarily. In the simplified, critical ease, the scalar potential contains two independent constant parameters, which are respectively related to the mass and angular momentum of the black hole in a particular way. As long as the angular momentum does not vanish, the metric can have zero, one or two horizons. The case with no horizon is physically uninteresting because of the curvature singularity lying at the origin. We identify the necessary conditions for at least one horizon to be present in the solution, which imposes some bound on the mass-angular momentum ratio. For some particular choice of pararneters our solution degenerates into some previously known black hole solutions.

关键词： rotating hairy black hole (2 + 1)-dimensional gravity non-minimal coupling scalar potential

Localization of five-dimensional Elko spinors on dS/AdS thick branes

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Chinese Physics C 2022年第2期46卷 1-12页

作者： Xiang-Nan Zhou Yun-Zhi Du Xin-Yuan Ma Zhen-Hua Zhao College of Physics and Information Engineering.Shanxi Normal University Linfen 04100China Institute of Theoretical Physics Datong UniversityDatong 037009China Department of Applied Physics Shandong University of Science and TechnologyQingdao 266590China

Owing to the special structure of a five-dimensional Elko spinor,its localization on a brane with codimension one becomes completely different from that of a Dirac *** introducing the coupling between the Elko spinor and the scalar field that can generate the brane,we have two types of localization mechanism for the five-dimensional Elko spinor zero mode on a *** is the Yukawa-type coupling,and the other is the non-minimal *** this study,we investigate the localization of the Elko zero mode on de Sitter and Anti-de Sitter thick branes with the two localization mechanisms,*** results show that both the mechanisms can achieve *** forms of the scalar coupling function in both localization mechanisms have similar properties,and they play a similar role in localization.

关键词： localization Elko spinor de Sitter and Anti-de Sitter thick brane Yukawa-type coupling non-minimal coupling