Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-03-30
Phys.Rev.D80:063505,2009
Physics
High Energy Physics
High Energy Physics - Theory
A slightly modified version of this article appeared in PRD
Scientific paper
10.1103/PhysRevD.80.063505
We discuss a novel explanation of the dark energy as a manifestation of macroscopic non-locality coming from quantum gravity, as proposed by Markopoulou. It has been previously suggested that in a transition from an early quantum geometric phase of the universe to a low temperature phase characterized by an emergent spacetime metric, locality might have been "disordered". This means that there is a mismatch of micro-locality, as determined by the microscopic quantum dynamics and macro-locality as determined by the classical metric that governs the emergent low energy physics. In this paper we discuss the consequences for cosmology by studying a simple extension of the standard cosmological models with disordered locality. We show that the consequences can include a naturally small vacuum energy.
Prescod-Weinstein Chanda
Smolin Lee
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