On Sunday, May 13, 2018 at 5:19:04 AM UTC, Bruce wrote: > > From: <[email protected] <javascript:>> > > > On Saturday, May 12, 2018 at 10:36:54 PM UTC, Bruce wrote: >> >> From: <[email protected]> >> >> >> Question for Bruce; >> >> Remember when you tried to establish an arrow of time at the quantum >> level with a paper on bremsstrahlung? Eventually, you withdrew that >> analysis. But if you believe quantum measurements are irreversible in >> principle, isn't that sufficient to establish an arrow of time at the >> quantum level? AG >> >> >> An arrow of time implies a direction. Simple irreversibility does not >> establish a direction for time. >> >> Bruce >> > > If a quantum measurement is, in principle irreversible, and is the result > of a decoherence process which in principle is reversible (since it's > unitary), is this not a contradictory position? This seems to be your > position IIUC. CMIIAW. AG > > > It would seem that you have not been listening to anything that I have > said. Many worlds is irreversible because we can't reach into other worlds > to reverse them. Collapse models are irreversible because the projections > (collapse) throws information away. The fact that decoherence is unitary > and reversible is irrelevant to this. And the fact that quantum measurement > is irreversible does not give a direction to time, so is not the source of > the arrow of time. No contradictions anywhere. > > Think about it before you come back with more questions....... > > Bruce >
I have been listening, very carefully. The reason collapse models throw information away is because you say so. AG -- 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 https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
