Dark energy is proposed to be the vacuum energy of a hidden QCD-like sector, set by a topological phase, which decays in discrete membrane-nucleation steps and may vanish within roughly the current age of the universe.
Quantum Cosmic No-Hair Theorem and Inflation
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We consider implications of the quantum extension of the inflationary no hair theorem. We show that when the quantum state of inflation is picked to ensure the validity of the EFT of fluctuations, it takes only ${\cal O}(10)$ efolds of inflation to erase the effects of the initial distortions on the inflationary observables. Thus the Bunch-Davies vacuum is a very strong quantum attractor during inflation. We also consider bouncing universes, where the initial conditions seem to linger much longer and the quantum `balding' by evolution appears to be less efficient.
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Discretely Evanescent Dark Energy
Dark energy is proposed to be the vacuum energy of a hidden QCD-like sector, set by a topological phase, which decays in discrete membrane-nucleation steps and may vanish within roughly the current age of the universe.