I read in Griffith's quantum mechanics that in a particular system, the second time measurement of the position (say) would yield the same result (the same collapse or the same spike)given that the measurement is done quickly (since it soon spreads out).(adsbygoogle = window.adsbygoogle || []).push({});

I don't understand how quick this is supposed to be. Could somebody give a quantitative feeling for this quickness?

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# I Wave function collapse

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