On Wednesday, October 16, 2019 at 4:47:43 PM UTC-5, Brent wrote: > > > > On 10/16/2019 2:05 PM, Philip Thrift wrote: > > > > On Wednesday, October 16, 2019 at 3:49:12 PM UTC-5, Brent wrote: >> >> >> >> On 10/16/2019 8:22 AM, John Clark wrote: >> >> On Tue, Oct 15, 2019 at 8:00 PM Bruce Kellett <[email protected]> wrote: >> >> > I*n the delayed choice experiment, the decision whether or not to >>> quantum erase the "which way" information can be made long after the >>> original photons hit the screen and make their marks there.* >>> >> >> No. In the delayed choice experiment the decision on if to erase the >> information about which slit the photon went through can be made after the >> photon passes through the slit, even billions of years after, but it must >> be made while the photon still exists and is inflight not after it hits the >> screen. >> >> >> I thought you read Carroll's book. His example shows in what sense you >> can erase the information after the photon has hit the screen. >> >> Brent >> > > > > > This ("you can erase the information after the photon has hit the screen") > can be shown to be possible in Many Worlds theory? > > What page of the book? (I'll get a copy and check it out.) > > > He's posted it on his blog https://www.preposterousuniverse.com/blog/ > almost word-for-word. > > Brent > > > Yes, there it is:
https://www.preposterousuniverse.com/blog/2019/09/21/the-notorious-delayed-choice-quantum-eraser/ But as he says: alas, not everyone is an Everettian. *So either one is an Everettian, or one is something even more outlandish (according to Sean Carroll). * @philipthrift -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/ac9177e2-8f4f-4fca-9aba-1d591f6ba376%40googlegroups.com.
