119 Pages
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Dark energy and bouncing universe from k-fields [Elektronische Ressource] / vorgelegt von Jin U Kang

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Dark Energy and Bouncing Universe from k-fieldsJin U KangMu¨nchen 2009Dark Energy and Bouncing Universe from k-fieldsJin U KangDoktorarbeitan der Fakult¨at fu¨r Physikder Ludwig–Maximilians–Universit¨atMu¨nchenvorgelegt vonJin U Kangaus PyongyangMu¨nchen, den 21. Juli 2009Erstgutachter: Prof. Dr. Viatcheslav MukhanovZweitgutachter: Prof. Dr. Peter MayrTag der mu¨ndlichen Pru¨fung: 11. September 2009to my parentsviContentsZusammenfassung ixAbstract xi1 Introduction and Discussion 12 Attractor scenarios and superluminal signals in k-essence cosmology 92.1 Physical restrictions on Lagrangians and solutions . . . . . . . . . . . . . . 92.2 Superluminal signals and causality . . . . . . . . . . . . . . . . . . . . . . 102.3 Equations of motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.4 Viable Lagrangians for tracking solutions . . . . . . . . . . . . . . . . . . 152.4.1 Tracker solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162.4.2 Radiation-dominated era . . . . . . . . . . . . . . . . . . . . . . . . 202.4.3 Dust-dominated era . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.4.4 Viable scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222.4.5 The existence of a superluminal epoch . . . . . . . . . . . . . . . . 233 New Ekpyrotic Ghost 253.1 Ghost condensate and new ekpyrosis: The basic scenario . . . . . . . . . . 253.2 Hamiltonian quantization . . . . . . . . . . . . . . . . .

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Published 01 January 2009
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