Quintessential inflation is studied using a string modulus as the inflaton-quintessence field. It is assumed that the modulus crosses an enhanced sym-metry point (ESP) in field space. Particle production at the ESP temporarilytraps the modulus resulting in a period of inflation. After reheating, the modu-lus freezes due to cosmological friction at a large value, such that its scalar po-tential is dominated by contributions due to fluxes in the extra dimensions. Themodulus remains frozen until the present, when it can become quintessence.
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