So, the standard interferometer setup has the same “photons coming in at right angles” deal. What it looks like EY has set up is the standard interferometer and then added phase difference- so instead of them constructively interfering at one and destructively interfering at the other, they’re always balanced.
But I don’t think you can actually set up a system like that (though quantum optics was one of my least favorite parts). It seems to me that you would get a 1-1 split on average but be able to get the other two. I would also be more comfortable if the configuration analysis tracked the photons separately- why is deflecting two separate photons the same mathematically as deflecting one photon twice?
So, the standard interferometer setup has the same “photons coming in at right angles” deal. What it looks like EY has set up is the standard interferometer and then added phase difference- so instead of them constructively interfering at one and destructively interfering at the other, they’re always balanced.
But I don’t think you can actually set up a system like that (though quantum optics was one of my least favorite parts). It seems to me that you would get a 1-1 split on average but be able to get the other two. I would also be more comfortable if the configuration analysis tracked the photons separately- why is deflecting two separate photons the same mathematically as deflecting one photon twice?
[edit] I was confused about EY’s post.