scholarly journals STRANGE QUARK MATTER ATTACHED TO THE STRING CLOUD IN THE SPHERICAL SYMMETRIC SPACE–TIME ADMITTING CONFORMAL MOTION

2005 ◽  
Vol 14 (08) ◽  
pp. 1365-1372 ◽  
Author(s):  
İLHAMİ YAVUZ ◽  
İHSAN YILMAZ ◽  
HÜSNÜ BAYSAL
Keyword(s):  
Symmetric Space ◽  
Quark Matter ◽  
Strange Quark ◽  
Space Time ◽  
Strange Quark Matter ◽  
Einstein’S Field Equations ◽  
Field Equations ◽  
Parameter Group ◽  
Conformal Motion ◽  
Einstein's Field Equations

In this paper, we have examined charged strange quark matter attached to the string cloud in the spherical symmetric space–time admitting one-parameter group of conformal motions. For this purpose, we have solved Einstein's field equations for spherical symmetric space–time with strange quark matter attached to the string cloud via conformal motions. Also, we have discussed the features of the obtained solutions.

THE BEHAVIOR OF THE STRANGE QUARK MATTER IN THE FRW UNIVERSES

2007 ◽  
Vol 22 (12) ◽  
pp. 2283-2291 ◽  
Author(s):  
IHSAN YILMAZ ◽  
AYSE KUCUKARSLAN ◽  
SERHAT OZDER
Keyword(s):  
General Relativity ◽  
Perfect Fluid ◽  
Quark Gluon Plasma ◽  
Quark Matter ◽  
Strange Quark ◽  
Gluon Plasma ◽  
Strange Quark Matter ◽  
Einstein’S Field Equations ◽  
Field Equations ◽  
Different Types

In this paper, we study strange quark matter for Friedman–Robertson–Walker (FRW) universes in the context of general relativity. For this purpose we consider quark–gluon plasma as a perfect fluid in the FRW universes. After solving Einstein's field equations, we have analyzed this matter for the different types of universe. Also, we discuss the features of collapsing strange quark matter.

scholarly journals KALUZA - KLEIN COSMOLOGICAL MODEL WITH QUARK AND STRANGE QUARK MATTER INF(R,T)GRAVITY

2021 ◽  
Vol 9 (04) ◽  
pp. 264-271
Author(s):  
Samadhan L. Munde ◽  
Keyword(s):  
Cosmological Model ◽  
Quark Matter ◽  
Deceleration Parameter ◽  
Strange Quark ◽  
Space Time ◽  
Strange Quark Matter ◽  
Field Equations ◽  
Constant Deceleration Parameter ◽  
General Solutions ◽  
Kaluza Klein

In this paper,Kaluza-Klein space-time with quark and strange quark matter in gravity has been considered. The general solutions of the field equations of Kaluza-Klein space-time have been obtained under the assumption of constant deceleration parameter. The physical and geometrical aspects of the model are also discussed in details.

HIGHER-DIMENSIONAL COSMOLOGICAL MODELS WITH STRANGE QUARK MATTER

2006 ◽  
Vol 15 (04) ◽  
pp. 477-483 ◽  
Author(s):  
IHSAN YILMAZ ◽  
ATTILA ALTAY YAVUZ
Keyword(s):  
General Relativity ◽  
Quark Gluon Plasma ◽  
Quark Matter ◽  
Strange Quark ◽  
Gluon Plasma ◽  
Strange Quark Matter ◽  
Cosmological Models ◽  
Field Equations ◽  
Higher Dimensional ◽  
Different Types

In this article, we study higher-dimensional cosmological models with quark–gluon plasma in the context of general relativity. For this purpose, we consider quark–gluon plasma as a perfect fluid in the higher-dimensional universes. After solving Einstein's field equations, we have analyzed this matter for the different types of universes in the higher- and four-dimensional universes. Also, we have discussed the features of obtained solutions.

scholarly journals On axially symmetric space–times admitting homothetic vector fields in Lyra’s geometry

2016 ◽  
Vol 94 (11) ◽  
pp. 1148-1152
Author(s):  
Ragab M. Gad ◽  
A.E. Al Mazrooei
Keyword(s):  
Vector Field ◽  
Symmetric Space ◽  
Vector Fields ◽  
Displacement Vector ◽  
Space Time ◽  
Axially Symmetric ◽  
Einstein’S Field Equations ◽  
Field Equations ◽  
Homothetic Vector ◽  
Lyra’S Geometry

This paper investigates axially symmetric space–times that admit a homothetic vector field based on Lyra’s geometry. The cases when the displacement vector is a function of t and when it is constant are studied. In the context of this geometry, we find and classify the solutions of the Einstein’s field equations for the space–time under consideration, which display a homothetic symmetry.

Kaluza–Klein Cosmological Model, Strange Quark Matter, and Time-Varying Lambda

2014 ◽  
Vol 69 (1-2) ◽  
pp. 90-96 ◽  
Author(s):  
Namrata Jain ◽  
Shyamsunder S. Bhoga ◽  
Gowardhan S. Khadekar
Keyword(s):  
Cosmological Model ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Time Varying ◽  
Einstein Field Equations ◽  
Field Equations ◽  
Different Types ◽  
Free Parameters ◽  
Kaluza Klein

In this paper, exact solutions of the Einstein field equations of the Kaluza-Klein cosmological model have been obtained in the presence of strange quark matter. We have considered the timevarying cosmological constant Λ as Λ = αH2 + βR-2, where α and β are free parameters. The solutions are obtained with the help of the equation of state for strange quark matter as per the Bag model, i.e. quark pressure p = 1/3(ρ - 4BC), where BC is Bag’s constant. We also discussed the physical implications of the solutions obtained for the model for different types of universes.

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