تقرير
Probing the dynamical system and thermal behaviours of the model, $\Lambda_0+3 \beta H^2.$
| العنوان: | Probing the dynamical system and thermal behaviours of the model, $\Lambda_0+3 \beta H^2.$ |
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| المؤلفون: | P, Jayadevan A, M, Mukesh, Akbar, Shaima, Mathew, Titus K |
| سنة النشر: | 2018 |
| المجموعة: | General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology |
| الوصف: | In this work we study the cosmological evolution of a two component model with non-relativistic dark matter and decaying vacuum of the form $\Lambda = \Lambda_0 + 3 \beta H^2.$ We contrast the model the model with the supernovae data and found that the model parameter $\beta=-0.010$ when the interaction parameter is zero and is $\beta=-0.002$ when $b=0.001.$ The thermal evolution study of the model indicates that it obeys the generalized second of entropy and also satisfies the convexity condition, $\ddot S <0$ so that the model behaves like an ordinary macroscopic system which approaching a stable equilibrium thermal state is the asymptotic condition. The dynamical system analysis reveals that, the model posses a prior decelerated epoch represented by a saddle critical point and the late critical point represents an accelerating epoch which posses a convergence of phase-space trajectories form both the regions of the point hence can be considered as stable. Comment: 15 pages and 10 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1808.07729 |
| رقم الأكسشن: | edsarx.1808.07729 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |