I'm trying to create a simplified diagram of the delayed choice quantum eraser experiment (contrast with the confusing one on Wikipedia and the simplified one on some random site). Here's what I have so far: Context that goes with the diagram: it is understood that an entangled pair of photons emerges from the top slit, the bottom slit, or a superposition thereof. One photon goes left while its entangled partner goes right. I mainly want to know (a) if the diagram is confusing, and (b) if an oversimplification has removed crucial information that needs to be clarified or called out. For example, in the actual experiment the photons don't really go in opposite directions. Also the diagram omits any lenses. Is that confusing? Misleading? Is the essence still there?