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The basic properties of oscillons -- localized, long-lived, time-dependentscalar field configurations -- are briefly reviewed, including recent resultsdemonstrating how their existence depends on the dimensionality of spacetime.Their role on the dynamics of phase transitions is discussed, and it is shownthat oscillons may greatly accelerate the decay of metastable vacuum states.This mechanism for vacuum decay -- resonant nucleation -- is then applied tocosmological inflation. A new inflationary model is proposed which terminateswith fast bubble nucleation.Comment: 11 pages, 4 figures, to appear in Int. J. Mod. Phys.

OSCILLONS IN SCALAR FIELD THEORIES: APPLICATIONS IN HIGHER DIMENSIONS AND INFLATION