Quintessential early dark energy

Understand

We introduce a unified model of early and late dark energy.

• We call it {\it quintessential early dark energy} model where early and late dark energy are explained by a single scalar field {\it i.e.}, two different energy scales are related by a single scalar field potential.
• To achieve this we introduce the modified steep exponential potential, which is chosen phenomenologically.
• This potential has a hilltop nature during the early time which consists of a flat region followed by a steep region.