Yes, if you have the exact present quantum state and you're assuming the normal quantum rules for continuous wavefunction evolution, you can determine the past quantum state. The answer might change if you assume that there's an objective physical reality to the "collapse" of wavefunction with measurement, distinct from the normal wavefunction evolution rules.
Jesse On Tue, Mar 18, 2014 at 5:33 PM, LizR <lizj...@gmail.com> wrote: > Am I right in assuming that in a quantum mechanical universe you can trace > the history backwards? > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to everything-list+unsubscr...@googlegroups.com. > To post to this group, send email to everything-list@googlegroups.com. > Visit this group at http://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
