From: <[email protected] <mailto:[email protected]>>
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? AGAn arrow of time implies a direction. Simple irreversibility does not establish a direction for time. BruceIf 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 -- 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.
