On Friday, May 4, 2018 at 9:44:49 PM UTC, Brent wrote: > > > > On 5/4/2018 12:07 PM, [email protected] <javascript:> wrote: > > Unfortunately, it is not the case that you can implement absolutely any >> unitary transformation in this way. For instance, you cannot implement the >> unitary transformation that would reverse a totally decohered event. >> > > *If the decoherence was unitary, why can't the process be reversed > statistically, analogous to the case of the classical cooling gas where we > imagine the hugely improbable incoming and absorption of the previously > outgoing IR photons? AG* > > > It's mathematically reversible, but it's not reversible by you or any > combination of powers in this world no matter how magical because this > world is orthogonal to other worlds that contain the information you would > need to reverse it. Which is why I suggested this be called nomologically > irreversible. > > Brent >
*I don't buy this argument. Since those other worlds don't exist, one cannot speak of information lost to them. 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.
