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http://hdl.handle.net/11129/5167
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Title: | Newtonian Cosmology |
Authors: | Övgün, Ali Zebari, Hamza Saber Saeed Eastern Mediterranean University, Faculty of Arts and Sciences, Dept. of Physics |
Keywords: | Physics Cosmology Cosmology quantum cosmology Cosmological constant Quantum bounce Radiation universe Dust universe |
Issue Date: | 2020 |
Publisher: | Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ) |
Citation: | Zebari, Hamza Saber Saeed. (2020). Newtonian Cosmology. Thesis (M.S.), Eastern Mediterranean University, Institute of Graduate Studies and Research, Dept. of Physics, Famagusta: North Cyprus. |
Abstract: | In this work, we have used the Friedmann equation of general relativity with quantum correction terms to the Newtonian potential to obtain the modified Friedmann equation with quantum correction. The behavior of the solution is examined with a sign of the correction being put into consideration. With the correction, the singular and non-singular universe is clearly spelled out. The results reveal that the quantum correction effect depends on the sign in the correction. Applying cosmological constant to the modified Friedmann Equation, we found out that the scale factor of the universe is given by the first order in the expression of We also compare the Friedmann Equations with Loop Quantum Gravity (LQG) to the Friedmann Equation with quantum correction and found out that, for negative the critical density is not feasible but it is feasible for positive values .
Keywords: Cosmology, quantum cosmology, Cosmological constant, Quantum bounce, Radiation universe, Dust universe. ÖZ:
Bu çalışmada, modifiye Friedmann denklemini kuantum düzeltmesi ile elde etmek için genel göreliliğin Friedmann denklemini kuantum düzeltme terimi ile Newton potansiyeline kullandık. Çözümün davranışı, dikkate alınan düzeltmenin işareti ile incelenir. Düzeltme ile, tekil ve tekil olmayan evren açıkça dile getirilir. Sonuçlar, kuantum düzeltme etkisinin düzeltme işaretine bağlı olduğunu göstermektedir. Modifiye edilmiş Friedmann Denklemine kozmolojik sabit uygulayarak, evrenin ölçek faktörünün τ ifadesinde ilk derece ϵ tarafından verildiğini öğrendik. Ayrıca, Döngü Kuantum Yerçekimi (LQG) ile Friedmann Denklemlerini kuantum düzeltmesi ile Friedmann Denklemi ile karşılaştırdık ve negatif için kritik yoğunluğun mümkün olmadığını, ancak pozitif değerler için mümkün olduğunu öğrendik .
Anahtar Kelimeler: Kozmoloji, kuantum kozmolojisi, Kozmolojik sabit, Kuantum sıçraması, Radyasyon evreni, Toz evren. |
Description: | Master of Science in Physics. Thesis (M.S.)--Eastern Mediterranean University, Faculty of Arts and Sciences, Dept. of Physics, 2020. Supervisor: Assist. Prof. Dr. Ali Övgün. |
URI: | http://hdl.handle.net/11129/5167 |
Appears in Collections: | Theses (Master's and Ph.D) – Physics
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