- #1

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## Main Question or Discussion Point

Quintessence fields are supposed to slowly roll down a potential V(\phi). Adding constants to the potential obviously does not change the equation of motion for this field, but it does change the pressure, energy density and equation-of-state. In particular, if I choose a sufficiently large positive consant, the equation of state

[tex]w = \frac{\dot \phi^2/2 - V(\phi)}{\dot \phi^2/2+V(\phi)}[/tex]

becomes eventually indistinguishable from -1.

Shouldn't physics stay invariant in this case?

[tex]w = \frac{\dot \phi^2/2 - V(\phi)}{\dot \phi^2/2+V(\phi)}[/tex]

becomes eventually indistinguishable from -1.

Shouldn't physics stay invariant in this case?