چکیده

Our universe seems to be radiation dominated at early times, and vacuum energy dominated at late times. When we consider the maximal analytic extension of this spacetime, its symmetries and complex analytic properties suggest a picture in which spacetime has two sheets, exchanged by an isometry which, in turn, picks a preferred (CPT-symmetric) vacuum state for quantum fields on the spacetime. I will explain how this line of thought makes several testable predictions and suggests new explanations for dark matter, the arrow of time, and various observed properties of the primordial perturbations. I will also introduce a related intriguing point: how a certain set of dimension-zero scalar fields, which automatically have a scale-invariant spectrum of vacuum fluctuations, also seem to "fix" the standard model vacuum, through a non-trivial cancellation of the vacuum energy and both terms in the weyl anomaly.

کليدواژه ها

Symmetry

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Latham Boyle , 1400 , A two-sheeted, CPT-symmetric universe , اولین کنفرانس بین المللی هولوگرافی و کاربردهای آن