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I propose a new mechanism to account for the observed tiny but finite darkenergy in terms of a non-Abelian Higgs theory, which has infinitely manyperturbative vacua characterized by a winding number, in the framework ofinflationary cosmology. Inflation homogenizes field configuration andpractically realizes a perturbative vacuum with vanishing winding number, whichis expressed by a superposition of eigenstates of the Hamiltonian withdifferent vacuum energy density. As a result, we naturally find a nonvanishingvacuum energy density with fairly large probability, under the assumption thatthe cosmological constant vanishes in some vacuum state. Since the predictedmagnitude of dark energy is exponentially suppressed by the instanton action,we can fit observation without introducing any tiny parameters.Comment: Honorable Mention, 2002 Gravity Research Foundation Essay

VACUUM SELECTION BY INFLATION AS THE ORIGIN OF THE DARK ENERGY