瑞士奶酪膜世界的大裂口和宇宙凌日

IF 1.1 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Canadian Journal of Physics Pub Date : 2022-11-30 DOI:10.1139/cjp-2022-0338

N. Ahmed, M. Fekry, T. M. Kamel

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引用次数: 2

摘要

我们研究了瑞士奶酪膜世界中的大撕裂情景。所得到的结果与宇宙常数Λ的值无关，无论它是正的、负的还是零。在当前模型中不允许使用负张力膜。在宇宙压力中有一个符号翻转对应于减速参数从正到负的符号翻转。EOS参数的演化表现为三个阶段:物质主导的减速时代、加速-实质阶段和幻相阶段。势项和动力项的演化也表现出符号的变化。对能量条件和宇宙学参数也进行了研究。

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Big rip in Swiss-cheese Brane-worlds with cosmic transit

We study the big rip scienario in Swiss-cheese Brane-worlds. The results obtained have been found to be independent of the value of the cosmological constant Λ whether its positive, negative or zero. Negative tension branes are not allowed in the current model. There is a sign ﬂipping in cosmic pressure corresponding to the sign ﬂipping in the deceleration parameter from positive to negative. The evolution of the EOS parameter shows the presence of three phases: the matter dominant decelerating era,The accelerated-Quitessence phase, and the phantom phase. The evolution of the potential and Kinetic term also shows a change of sign. The energy conditions and cosmographic parameters have also been investigated.

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来源期刊

Canadian Journal of Physics 物理-物理：综合

CiteScore

2.30

自引率

8.30%

发文量

审稿时长

1.7 months

期刊介绍： The Canadian Journal of Physics publishes research articles, rapid communications, and review articles that report significant advances in research in physics, including atomic and molecular physics; condensed matter; elementary particles and fields; nuclear physics; gases, fluid dynamics, and plasmas; electromagnetism and optics; mathematical physics; interdisciplinary, classical, and applied physics; relativity and cosmology; physics education research; statistical mechanics and thermodynamics; quantum physics and quantum computing; gravitation and string theory; biophysics; aeronomy and space physics; and astrophysics.