On Sat, Jan 12, 2019 at 8:01 AM <agrayson2...@gmail.com> wrote: > On Friday, January 11, 2019 at 7:46:19 PM UTC, Brent wrote: >> >> On 1/11/2019 2:02 AM, agrays...@gmail.com wrote: >> >> If probability values are always positive and between 0 and 1, how does >> one get destructive interference, or constructive interfering probability >> values within the acceptable range? Brent once answered this question but I >> have completely forgotten the answer. AG >> >> >> The wave function is a complex valued field, so it's values are not in >> [0,1). Its complex value is usually called 'the probability *amplitude*' >> to distinguish it from a probability value. >> > > I was aware of the foregoing. I'll check out your reference. Now I want to > see how the probability values are constrained to be in the appropriate > range after Born's rule is applied. AG >
It is known as "unitarity". Evolution in QM by the Schroedinger equation is always unitary -- given by exp(-iH) -- so probabilities can never exceed unity, because the mod-squared of the evolution operator can never exceed unity.. Bruce -- 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 email@example.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.