String Cloud with Quark Matter in Self-creation Cosmology

Mahanta, K. L.; Biswal, S. K.; Sahoo, P. K.; Adhikary, M. C.

doi:10.1007/s10773-011-1031-4

Cited by 22 publications

(11 citation statements)

References 54 publications

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“…To solve the field equations (15)- (19), we follow the method recently used by Saha and Visinescu [36]. From (16) and (17) we get…”

Section: Solution Of the Field Equationsmentioning

confidence: 99%

Some exact solutions of magnetized viscous model in string cosmology

Singh

2014

Pramana - J Phys

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Abstract. In this paper, we study anisotropic Bianchi-V universe with magnetic field and bulk viscous fluid in string cosmology. Exact solutions of the field equations are obtained by using the equation of state for a cloud of strings, and a relationship between bulk viscous coefficient and scalar expansion. The bulk viscous coefficient is assumed to be inversely proportional to the expansion scalar. It is interesting to examine the effects of magnetized bulk viscous string model in early and late stages of the evolution of the universe. This paper presents the different string models like geometrical (Nambu string), Takabayashi (p-string) and Reddy string models by taking certain physical conditions. We discuss the nature of the classical potential for viscous fluid with and without magnetic field. We find that the introduction of bulk viscosity with and without magnetic field results in rapid change in density parameters and in the classical potential. The presence of bulk viscosity prevents the universe to be empty in its future evolution. The other physical and geometrical aspects of each string model are discussed in detail.

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“…To solve the field equations (15)- (19), we follow the method recently used by Saha and Visinescu [36]. From (16) and (17) we get…”

Section: Solution Of the Field Equationsmentioning

confidence: 99%

Some exact solutions of magnetized viscous model in string cosmology

Singh

2014

Pramana - J Phys

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“…Also, the study Bianchi III universe with strange quark matter attached to cosmic string have been studied by Mahanta et.al. in Self Creation cosmology [43]. Katore and Shaikh have researched strange quark matter attached to cosmic string for axially symmetric space-time in GR [44].…”

Section: Introductionmentioning

confidence: 99%

Higher Dimensional Topological Defect Solutions with Quark Matter in Gravitation Theories

Çag̃lar¹,

Aygün²

2017

AdAp

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In this paper we have researched higher dimensional flat Friedmann-Robertson-Walker (FRW) cosmological model solutions for string cloud and domain walls coupled with quark and strange quark matters in Lyra and Riemann geometries. We have obtained that string tension density is zero in Lyra and Riemann geometries. Also, the displacement field vector behaves like a cosmological constant in our models. In addition to these, some physical and kinematical quantities have been generalized and discussed in Lyra and Riemann geometries. Also our results are consistent with the results of Yılmaz, Back et al. and Adcox et al. in four dimensions.

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“…In literature, string cosmological models for different Bianchi Types (homogeneous and anisotropic) space-times have been widely studied in different physical and geometrical contexts by many authors viz. Banerjee et al [8], Tikekar and Patel [9,10], Ilhami and Tarhan [11], Bali et al [12][13][14][15][16][17][18], Wang [19], Reddy et al [20], Rao et al [21,22], Mahanto et al [23].…”

Section: Introductionmentioning

confidence: 99%