كيهان شناسي با ابعاد اضافي و اصل عدم قطعيت تعميم يافته مبتني بر نسبيت خاص دو گانه

زینالی, کاظم and دارابی, فرهاد and متولی, حسین (1392) كيهان شناسي با ابعاد اضافي و اصل عدم قطعيت تعميم يافته مبتني بر نسبيت خاص دو گانه. Modern Physics Letters A ــ 28 (12). pp. 1350047-1. شاپا 0217-7323

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Official URL: http://www.worldscientific.com/doi/abs/10.1142/S02...



English Abstract

A multi-dimensional cosmology with FRW type metric having four-dimensional spacetime and d-dimensional Ricci-flat internal space is considered with a higher-dimensional cosmological constant. The classical cosmology in commutative and Doubly Special Relativity–Generalized Uncertainty Principle (DSR–GUP) contexts is studied and the corresponding exact solutions for negative and positive cosmological constants are obtained. In the positive cosmological constant case, it is shown that unlike the commutative as well as GUP cases, in DSR–GUP case both scale factors of internal and external spaces after accelerating phase will inevitably experience decelerating phase leading simultaneously to a big crunch. This demarcation from GUP originates from the difference between the GUP and DSR–GUP algebras. The important result is that unlike GUP which results in eternal acceleration, DSR–GUP at first generates acceleration but prevents the eternal acceleration at late-times and turns it into deceleration.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :کاظم زینالی
نویسنده مسئول :فرهاد دارابی
Additional Information:Impact Factor : 1.083 Abstracted & Indexed in : Science Citation Index, Scopus, Astrophysics Data System (ADS) Abstract Service , Current Contents®/Physical, Chemical & Earth Sciences , Chemical Abstracts Service , INSPEC , ISI Alerting Services , Mathematical Reviews , ciSearch , Zentralblatt MATH
Uncontrolled Keywords:كيهان شناسي با ابعاد اضافي ; اصل عدم قطعيت تعميم يافته مبتني بر نسبيت خاص دو گانه
کلیدواژه ها (انگلیسی):Multi-dimensional cosmology ; DSR–GUP
Subjects:WN Radiology . Diagnostic Imaging
Divisions:Faculty of Medicine > Department of Basic Sciences > Department of Medical Physics
ID Code:4123
Deposited By: Dr Kazem Zeinali
Deposited On:02 Feb 1392 10:50
Last Modified:02 Feb 1392 11:01

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