On Wed, May 7, 2025 at 8:58 PM Brent Meeker <[email protected]> wrote:
*>>> that doesn't mean you can't measure them both precisely* >> >> > *>> But thanks to Heisenberg's uncertainty principle you can't predict >> what that measurement will be, and even if you repeat conditions exactly >> you will not get the same measurements for momentum and position (or energy >> and time) if you perform the experiment again.* > > > *> Yes, exactly. But my point is that the fact that you can measure both > precisely for the same particle is commonly denied. The problem in is that > the HUP applies to an ideal measurement, one that leaves the system having > the measured value, in other words a preparation.* *In physics experiments "preparation" means making sure a system is in one and only one quantum state. The big question is what was the state of the system before it was prepared? Many Worlds says it was in every state that is not forbidden by Schrodinger's Equation. Copenhagen says I am not allowed to ask that question. But I ask it anyway.* *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* ina -- 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 visit https://groups.google.com/d/msgid/everything-list/CAJPayv3de6aFBNBQHxBzObrgPaE6mNfb_gy1j_971KAi9yGCPw%40mail.gmail.com.
