Interaction of Anisotropic Dark Energy with Generalized Hybrid Expansion Law

Alam, Md. Khurshid; Singh, S. Surendra; Devi, L. Anjana

doi:10.1155/2022/5820222

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…[62] Some of the works also reported the value of the Hubble constant as H 0 = 67.4km∕s∕Mpc, [63] H 0 = 67.94 +0.72 −0.72 km∕s∕Mpc, [64] H 0 = 67.8 +1.8 −1.8 km∕s∕Mpc [65] and H 0 = 70.07km∕s∕Mpc. [66] Figure 4.…”

Section: Bao Data Setmentioning

confidence: 99%

Dynamical System Approach and Thermodynamical Perspective of Hořava‐Lifshitz Gravity

Samaddar,

Singh

2024

Fortschritte der Physik

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The authors have examined a Friedmann Robertson Walker cosmological model in Hořava‐Lifshitz gravity by using a dynamical system approach. A set of autonomous equations is derived and their solutions are calculated. The critical points from these equations and find the characteristics values with the analysis of the physical interpretation of the phase space for this system are assessed. Three stable critical points are found and the values of the physical parameters and the scale factor's expressions at each critical points are displayed in Tables 1, 2, and 3. A hybrid scale factor to develop the model, which results in a phase transition from deceleration to acceleration is used. The suitable values of the parameters are governed by applying the Monte Chain Monte Carlo method technique to the Hubble 46 and joint Hubble 46 and Baryon Acoustic Oscillations 15 datasets. In contrast to the negative behavior of pressure, the positive behavior of energy density and illustrate the Universe's acceleration epoch and the model is represented by the EoS parameter . The authors investigated that the energy conditions and their model violates the strong energy condition. Utilizing diagnostic test, it is found that the model represents phantom behavior. The thermodynamical perspective for the model is also examined. The model accurately explained the Universe's propagation history and fits well with contemporary cosmic data.

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Section: Bao Data Setmentioning

confidence: 99%

Dynamical System Approach and Thermodynamical Perspective of Hořava‐Lifshitz Gravity

Samaddar,

Singh

2024

Fortschritte der Physik

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“…Additionally, the cosmic microwave background (CMB) anomalies from the Planck data [18], which were acquired, supported the notion of an anisotropy phase at the beginning of the Universe followed by an isotropy phase. The Bianchi type-I model has been examined by a number of researchers [48,49,50,51]. Based on the aforementioned studies, we investigate the Renyi holographic model of DE with f (G) gravity in the Bianchi type-I universe in this paper.…”

Section: Introductionmentioning

confidence: 99%

Renyi Holographic dark energy and its behaviour in f(G) gravity

Alam¹,

Singh²,

Devi³

2022

Preprint

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In this work, the Renyi holographic dark energy (RHDE)and its behaviour has been explored with the anisotropic and spatially homogeneous Bianchi type-I Universe in the framework of f (G) gravity. We use IR cutoff as the Hubble and Granda-Oliveros (GO) horizons. To find a consistent solutions of the field equations of the models, it is assumed that the deceleration parameter is defined in terms of function of Hubble parameter H. With reference to current cosmological data, the behaviors of the cosmological parameters relating to the dark energy model are evaluated and their physical significance is examined. It is observed that for both the models, the equation of state parameter approaches to −1 at late times. However, the RHDE model with the Hubble horizon exhibits stability from the squared sound speed, but the RHDE model with the GO horizon exhibits instability. In both the models, deceleration parameter and statefinder diagnostic confirm the accelerated expansion of the Universe and also correspond to the ΛCDM model at late times.

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