I am a non physicist so please bear with me here. I am just trying to see if my understanding of the implications of the delayed quantum eraser experiment is even remotely accurate.
If the apparatus was set up to record the the pattern from the double slit experiment on a photographic plate which required later development.
Then without detecting which path (slit) single photons are fired you would expect a interference pattern when the plate was developed (yes?)
Or if a detector recorded information (about which slit single photons pass) you would expect the wave function to collapse and see just two lines (corresponding to the slits) when the plate was developed (yes?)
Finally if the information about the path is destroyed before the plate is developed we would see the interference pattern again (yes?)
So what would happen if the information about the path of travel was hidden (perhaps on an encrypted hard drive or even in an unseen sealed envelope)
If before I develop the plate I look at the information on the hard drive or in the envelope the paths of the photons are established the wave function collapses and I would see two lines (yes?)
If I destroy the hard drive (magnetically or physically) or burn the envelope the information about the path of travel is destroyed forever and when I develop my photographic plate I would see the interference pattern (yes?)
Would this be a bit like the Schrodinger's cat scenario where the undeveloped photographic plate would have both the two lines and interference pattern until I decide to peak at the information or destroy it
Thanks for reading and I would really appreciate any insights you can provide me with :)