On Sun, Feb 08, 2009 at 09:34:30PM -0500, Jesse Mazer wrote: > > > > > > Date: Mon, 9 Feb 2009 13:02:31 +1100 > > From: [email protected] > > To: [email protected] > > Subject: Re: [[email protected]: Jacques Mallah] > > > > > All I have ever said was that effective probability given by the > > squared norm of the projected eigenvector does not follow from Born's > > rule. It can't follow, because Born's rule says nothing about what the > > normalisation of the state vector after observation should be. It is a > > conditional probability only. > I still don't understand the connection you're making. When people say the > effective probability is equal to the amplitude squared, it doesn't require > you to assume anything about the state vector *after* observation (in > particular you don't have to assume an objective collapse), it's just the > square of the norm of the vector you get when you project the system's > (normalized) state vector at the instant *before* observation onto an > eigenvector. > Jesse
Sure. What you've just said is just an interpretation-free description of the mathematics. Whether it is a helpful description is another matter. But Jacques Mallah is making a metaphysical claim when saying it is equal to the squared amplitude of the branch. Which is a completely different beast. He must have some model in mind which tells us how the "amplitude" of the branches relates to the "amplitude" of the original state. Cheers -- ---------------------------------------------------------------------------- A/Prof Russell Standish Phone 0425 253119 (mobile) Mathematics UNSW SYDNEY 2052 [email protected] Australia http://www.hpcoders.com.au ---------------------------------------------------------------------------- --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/everything-list?hl=en -~----------~----~----~----~------~----~------~--~---
