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.

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.

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.

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.

RIGIDLY ROTATING STRANGE QUARK STARS

2005 ◽  
Vol 14 (03n04) ◽  
pp. 697-705 ◽  
Author(s):  
İHSAN YILMAZ ◽  
HÜSNÜ BAYSAL
Keyword(s):  
General Relativity ◽  
Electromagnetic Field ◽  
Quark Matter ◽  
Strange Quark ◽  
Fluid Model ◽  
Strange Quark Matter ◽  
Rigid Rotation ◽  
Field Equations ◽  
Quark Stars ◽  
Gödel Universe

In this article, we study rotating strange quark stars in the context of general relativity. For this purpose we consider perfect fluid model composed of strange quark matter with electromagnetic field in the Gödel Universe which has rigid rotation. We solve Einstein's field equations by using equation of state for strange quark matter. Also, we discuss the features of obtained solutions.

Relationship between magnetic field and anisotropy parameter in gravitation theories

2018 ◽  
Vol 33 (24) ◽  
pp. 1850135 ◽  
Author(s):  
Can Aktaş ◽  
Sezgin Aygün ◽  
Pradyumn Kumar Sahoo
Keyword(s):  
Magnetic Field ◽  
General Relativity ◽  
Dark Energy Model ◽  
Strange Quark ◽  
Anisotropy Parameter ◽  
Strange Quark Matter ◽  
Cosmological Term ◽  
Field Equations ◽  
Constant Deceleration Parameter ◽  
Physical Consequences

The magnetized strange quark matter (MSQM) solutions are obtained for a Marder type universe using constant deceleration parameter. The exact solutions of field equations are obtained for f(R,[Formula: see text]T) = R + 2f(T) model given by [T. Harko et al., Phys. Rev. D 84, 024020 (2011)] with cosmological term. Also, we have obtained General Relativity (GR) solutions for MSQM distributions. For [Formula: see text], we get the dark energy model, i.e. [Formula: see text], [Formula: see text] and [Formula: see text]. However, for [Formula: see text], we find the cosmological constant [Formula: see text] as negative in f(R,[Formula: see text]T) theory and GR. These results agree with [S. Aygün et al., Astrophys. Space Sci. 361, 380 (2016); C. Aktaş and S. Aygün, Chinese J. Phys. 55, 71 (2017); P. K. Sahoo et al., Mod. Phys. Lett. A 32, 1750105 (2017)] in f(R,[Formula: see text]T) theory. The physical consequences of our obtained models are discussed at the end.

scholarly journals Kantowski-Sachs Cosmological model with quark and strange quark matter in f(R) theory of gravity

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Kishor S. Adhav ◽  
Abhijit S. Bansod ◽  
Samadhan L. Munde
Keyword(s):  
Cosmological Model ◽  
Physical Condition ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Field Equations ◽  
General Solutions ◽  
Scalar Expansion ◽  
Shear Scalar ◽  
Theory Of Gravity

AbstractIn this paper we have studied the Kantowski- Sachs cosmological model with the quark and strange quark matter in the f (R) theory of gravity. The general solutions of the field equations are obtained by assuming the physical condition shear scalar σ is proportional to scalar expansion θ, which leads to the relation B = An between metric coefficients B and A. The physical and geometrical aspects of the model are also discussed.

Sign in / Sign up

Export Citation Format

Share Document