Constraining dark energy

TL;DR

This paper proposes a mechanism based on transplanckian physics and vacuum state choices that prevents theories violating a holographic bound from causing accelerated expansion, potentially leading to detectable CMBR signatures.

Contribution

It introduces a novel mechanism that constrains dark energy theories violating a holographic bound using insights from transplanckian physics and vacuum state selection.

Findings

Supports the possibility of detectable CMBR signatures of new physics

Provides a theoretical framework to prevent accelerated expansion in certain dark energy models

Links holographic bounds with transplanckian physics mechanisms

Abstract

In this paper we propose a mechanism that protects theories violating a holographic bound suggested in arXiv:1203.5476 from developing accelerated expansion. The mechanism builts on work on transplanckian physics, and a non-trivial choice of vacuum states. If correct, it lends further support for detectable signatures in the CMBR signalling new physics.