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Inflationary spectra, decoherence, and two-mode coherent states
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We re-examine the question of the entropy stored in the distribution of primordial density fluctuations. To this end we make use of two-mode coherent states. These states incorporate the isotropy of the distribution as well as the temporal coherence and the semi-classical character of highly amplified modes. They also provide a lower bound for the entropy if, as one expects, decoherence processes erase the squeezing which originally characterized the distribution in inflationary models. This lower bound is one half the maximal (thermal) value. By considering backreaction effects, we also provide an upper bound for this entropy at the onset of the adiabatic era.
Forward citations
Cited by 2 Pith papers
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A Landscape of Cosmological Decoherence
A geometric landscape of mixed states for cosmological perturbations unifies decoherence models and derives non-linearity bounds that rule out decohered thermal states and limit amplitude-diagonal models to under 70 e...
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On the Quantum-to-Classical Transition of Primordial Perturbations
A dissertation that introduces slow-roll inflation and perturbations, critiques squeezing and decoherence formalisms, and investigates the pilot-wave approach to the quantum-to-classical transition with numerical illu...
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