Second law of gravitational thermodynamics in the locally rotationally  symmetric Bianchi type-II universe

Murat KORUNUR

Makale detayları

Second law of gravitational thermodynamics in the locally rotationally symmetric Bianchi type-II universe

Yazarlar:

Murat KORUNUR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2017 Vol.41 Issue 5, pp.396-404

Belge Tipi:

Makale

Yayın Tarihi:

9/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000759549

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Özet:

 

In this work, under the assumption that the universe is locally rotationally symmetric (LRS) Bianchi type-II and filled with anisotropic dark fluid (dark energy and dark radiation), we investigate whether the generalized second law of thermodynamics (GSLT) is still valid. We also consider another important condition for LRS Bianchi type-II spacetimes whereby the model expansion θθ\theta  is proportional to the shear σσ\sigma , which leads to B=AnB=AnB=A^{n} (where n is a constant and A and B are the metric potentials). Based on this, we derive a general circumstance for the GSLT and find that its validity depends on the anisotropies of both the dark fluid and the metric potentials. We conclude that the GSLT still holds at all times even if these two anisotropic conditions are removed from the results.

Makale detayları

Second law of gravitational thermodynamics in the locally rotationally symmetric Bianchi type-II universe

Yazarlar: Murat KORUNUR

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2017 Vol.41 Issue 5, pp.396-404

Belge Tipi: Makale

Yayın Tarihi: 9/2017

Belge Dili: Türkçe

Document ID (Org No.): 2000759549

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Sayı

Yazarlar:

Murat KORUNUR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2017 Vol.41 Issue 5, pp.396-404

Belge Tipi:

Makale

Yayın Tarihi:

9/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000759549

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101