how fast does the wave function "decollapse"? as you know the wave function (indeterminacy) may collapse due to a measurement. However, after a measurement it returns after a while to its initial state of indetermincy. (I don't know what to call this transition back to indetermincy; is there a commonly used term for this?) My question is. Have there been any investigations of the average time it takes after a "collapse" for a wave function to return to its initial state of indeterminacy. Can anyone point to a site with information about this?