On Thu, Nov 20, 2014 Bruno Marchal <[email protected]> wrote: > The "mutiverse" is only the quantum configuration space taken seriously. > The SWE describe all quantum evolution as a rotation (a unitary > transformation) of a state vector in the Hilbert space. I can hardly > imagine something more reversible. >
Yes the Schrodinger Wave Equation is easily reversible (and it's continuous and deterministic too), but with regard to the reversibility of time that's a irrelevant fact because the SWE is a unobservable abstraction. To get something real that you can actually see you must square the amplitude of the SWE of a particle at a point and that will give you the probability you will observe the particle at that point, and probability, unlike the SWE, is something that you can observe and measure. And Schrodinger's equation has complex values, that means it has a "i" (the square root of -1) in it, and that means very different quantum wave functions can give the exact same probability when you square it; and if X and Y both produce Z then things are not reversible, if you're in state Z there is no way to know if the previous state was X or Y. You get all sorts of strange stuff with i, like i^2=i^6 =-1 and i^4=i^100=1. And in the macroscopic non quantum world if the probability of me flipping a coin and getting heads is 1/2 and the probability of you flipping a coin and getting heads is 1/2 then the probability of both you and me getting heads is 1/4, but in Quantum Mechanics that's not necessarily true because now you must deal with i and complex numbers. I think you could say that mathematically it's the existence of that damn i in the SWE that makes Quantum Mechanics so weird. John K Clark -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
