On 9/18/2011 15:31, Patrick Elliott wrote:
> Well.. Yes and no. The quantum eraser "changes the conditions" withing that
> D time frame, such that the transition to a state is interrupted, by
> inserting a new set of conditions that allow for the prior quantum state.

Right.

> Since the transition never took place, no state change happened.

Right. Indeed, that's the point of the experiment.  That it is *not* the 
case that the particle went through one slit or the other or both.

You said
 > A real cat would already invalidate the experiment, as would anything 
else you might use, like a sheet of radiation sensitive material

But that's clearly not the case, if what you're measuring is whether the 
particle went through one slit or the other or both or neither.

Other than that, you're pushing the analogy too far for me to track what 
you're talking about.

-- 
Darren New, San Diego CA, USA (PST)
   How come I never get only one kudo?

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