🚀 go-pugleaf

How do you know you can't combine the beams coherently. If they can't be
coherent the scheme won't work. But it is obvious that they can be coherent.
There are analogous experiments with Stern Gerlach's and with neutron
interferometers. Also if you have two calcite rhombs back to back you can
recombine the extraordinary and ordinary beams from the first rhomb
coherently to reproduces the incident 45 degrre linear polarized beam.

And to repeat |a,e,+> is not orthogonal to |a,o,+> , on the contrary they
are parallel |a,e,+> = e^ix|a,o,+>. |a,e(o),+> is orthogonal to |a,e(o),->.