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Non-exotic static spherically symmetric thin-shell wormhole solution in f(Q,T)gravity

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Chinese Physics C 2023年第7期47卷 173-189页

作者： moreshwar tayde Sayantan Ghosh P.K.Sahoo Department of Mathematics Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India

In this study,we conduct an analysis of traversable wormhole solutions within the framework of linear f(Q,T)=αQ+βT gravity,ensuring that all energy conditions hold for the entire *** solutions presented in this paper are derived through a comprehensive analytical examination of the parameter space associated with the wormhole *** involves considering the exponents governing the redshift and shape functions,as well as the radius of the wormhole throat(r_(0)),the redshift function value at the throat(∅_(0)),and the model parameters(αandβ).Moreover,we establish bounds on these free parameters,which guarantee the satisfaction of the energy conditions throughout spacetime and also provide two ***,we use the Israel junction condition to observe the stability of a thin-shell around the ***,we calculate the null energy condition criteria as well as the potential for the thin-shell and how it varies with the chosen shape function.

关键词： wormhole energy conditions f(Q,T)gravity junction condition thin-shell

Static spherically symmetric wormholes in f(Q,T)gravity

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Chinese Physics C 2022年第11期46卷 275-290页

作者： moreshwar tayde Zinnat Hassan P.K.Sahoo Sashideep Gutti Department of Mathematics Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India Department of Physics Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India

In this study,we obtain wormhole solutions in the recently proposed extension of symmetric teleparallel gravity,known as f(Q,T)***,the gravitational Lagrangian L is defined by an arbitrary function f of Q and T,where Q is a non-metricity scalar,and T is the trace of the energy-momentum *** this study,we obtain field equations for a static spherically symmetric wormhole metric in the context of general f(Q,T)*** study the wormhole solutions using(ⅰ)a linear equation of state and(ⅱ)an anisotropy *** adopt two different forms of f(Q,T),(a)linear f(Q,T)=αQ+βT and(b)non-linear f(Q,T)=Q+λQ^(2)+ηT,to investigate these *** investigate various energy conditions to search for preservation and violation among the obtained solutions and find that the null energy condition is violated in both cases of our assumed forms of f(Q,T).Finally,we perform a stability analysis using the Tolman-Oppenheimer-Volkov equation.

关键词： wormhole EoS energy conditions stability analysis f(Q,T)gravity

MoO_3-TiO_2纳米晶体复合材料光降解糖蜜(英文)

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催化学报 2012年第2期33卷 261-266页

作者： Madhukar NAVGIRE Ajeet YELWANDE Deepak tayde Balasaheb ARBAD Machhindra LANDE Department of Chemistry Dr.Babasaheb Ambedkar Marathwada University

A MoO3-TiO2 nanocrystalline composite material was prepared by a simple solgel *** synthesized material was charac-terized by X-ray diffraction,scanning electron microscopy with an electron dispersion spectroscopy,transmission electron microscopy,and Fourier transform infrared *** is a dark brown pigment found in wastewater from the sugar industry and it pollutes *** polluted water is generally referred to as molasses and it undergoes fermentation and is solely responsible for water,soil,and air *** synthesized catalytic material was found to be effective in degrading molasses under UV-visible *** of treated and untreated molasses was carried out by measuring its color,chemical oxygen demand,biological oxygen demand,pH,and total dissolved *** from these analyses indicate the effective photodegradation of the *** methodology has several advantages such as high photocatalytic activity,non-toxicity,cleanliness,and reusability of the catalytic material.

关键词： sol-gel molybdenum oxide titanium oxide photodegradation molasses pollution control