Late-time effects of Planck-scale cosmology: dilatonic interpretation of the dark energy field

TL;DR

This paper proposes a string theory-based dark energy model involving a strongly coupled dilaton field, highlighting differences from conventional quintessence models and exploring late-time cosmological effects.

Contribution

It introduces a dilaton-based dark energy model derived from string effective action with strong coupling to dark matter, offering a novel perspective on late-time cosmology.

Findings

Distinct behavior from standard quintessence models

Implications for late-time cosmic acceleration

Potential observational signatures of dilaton coupling

Abstract

We present a model of dark energy based on the string effective action, and on the assumption that the dilaton is strongly coupled to dark matter. We discuss the main differences between this class of models and more conventional models of quintessence,uncoupled to dark matter. This paper is based on talks presented at the "VII Congresso Nazionale di Cosmologia" (Osservatorio Astronomico di Roma, Monte Porzio Catone, November 2002), and at the Meeting "Dark Energy Day" (University of Milano-Bicocca, November 2002). To appear in the Proc. of the International Conference on ``Thinking, Observing and Mining the Universe" (Sorrento, September 2003), eds. G. Longo and G. Miele (World Scientific, Singapore).