More relevant to the actual nucleation process are MD simulations where vapor nucleation is induced by increasing simulation cell volume, and thus, applying negative pressure or tension to the liquid phase. Under tension, the nucleation barrier is lower and the critical radius is smaller, which allows a direct observation of vapor bubble formation by MD simulations . In fact, it was demonstrated for simple liquids described by Lennard-Jones potential that, with this approach, it is possible to observe vapor nanocavity formation and characterize cavity growth rate that exhibits large deviation from the rate predicted by continuum theory .