On 2/4/2014 1:58 PM, Jesse Mazer wrote:
On Tue, Feb 4, 2014 at 4:39 PM, meekerdb <[email protected] <mailto:[email protected]>> wrote:On 2/4/2014 1:11 PM, Jesse Mazer wrote:On Tue, Feb 4, 2014 at 3:59 PM, LizR <[email protected] <mailto:[email protected]>> wrote: There is nothing exotic about the state of a photon being determined by future boundary conditions. You *could* determine the state of any system in quantum theory by future boundary conditions, but what would be exotic is the assumption that neither past nor future boundary conditions are sufficient on their own, that you need a combination of both. That just isn't how it works in quantum theory,Some people think it is. When the past boundary condition doesn't predict a definite future condition, then adding a future boundary condition can resolve it. That's how Stenger effectively gets a non-local effect in an EPR experiment.If we ignore the idea of a "collapse" of the quantum state on measurement, isn't the evolution of the wave function deterministic, so that knowing the complete past quantum state of an isolated system is always enough to calculate the later quantum state? Is Stenger basically arguing that the "collapse" on measurement is not really random but is determined by a combination of past and future boundary conditions?
It's still really random (or really FPI) but information as to which way the polarizer is oriented is communicated from one detector to the other via the zig-zag back to the emitter and forward to the other dectector. So yes, the polarizer orientations are future boundary conditions. At least that's the way I think it's supposed to work.
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