Quintessential Difficulties

Details Quintessential Difficulties Quintessential Difficulties

1998-11-17

arxiv.org/abs/hep-ph/9811375v3

Phys.Lett. B458 (1999) 197-201

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages LaTeX. Revised to be more pedagogical; results unchanged

Scientific paper

10.1016/S0370-2693(99)00657-7

An alternative to a cosmological constant is quintessence, defined as a slowly-varying scalar field potential V(\phi). If quintessence is observationally significant, an epoch of inflation is beginning at the present epoch, with \phi the slowly-rolling inflaton field. In contrast with ordinary inflation, quintessence seems to require extreme fine tuning of the potential V(\phi). The degree of fine-tuning is quantified in various cases.

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