Speaker
Dr
David Andriot
(LAPTh, CNRS)
Description
Dark energy is currently being observed with unprecedented precision. Several cosmological models can for now fit this data. But only some of them can be obtained from string theory: this offers an interesting theoretical prior. We will review to what extent a cosmological constant or an exponential quintessence can be obtained from string theory. Eventually, we will focus on (string-motivated) quintessence coupled to (dark) matter, which has several interesting features: an effective phantom regime, with a possibly divergent e.o.s. parameter, and an Early Dark Energy behaviour.
Author
Dr
David Andriot
(LAPTh, CNRS)