Recent content by David Charles

Thanks, I like that. If you have time, could you take a look at my follow-up post here: https://www.physicsforums.com/threads/double-slit-interference-question-ii.990311/ I'm trying to see if a simplified apparatus will destroy an interference pattern. I have several other questions, but I'm...

I think it is possible.

Thanks so much, Bill. Could you take a look at my follow-up post here?: https://www.physicsforums.com/threads/double-slit-interference-question-ii.990311/ I’m trying to drill down to what we would measure by a simple apparatus. Maybe you could either answer my question or help me ask the...

A stream of photons pass through a double-slit. The photon stream emerging from each slit then passes through a crystal which splits each photon into coherent entangled pairs. One photon from each pair heads towards a detector (D0) that "can be scanned by a step motor along its x-axis for the...

Thanks, so much Dr. Chinese and everyone. I'm intrigued that the "particle wave duality terminology has been abandoned". I'm interested in learning more about this. I've posted a similar question with new figures that I hope can help me understand this behavior. See "Double Slit Interference...

Thanks, Nugatory - yes, I guess I'm not precise in my terminology and employing old school ideas. (and I have read QED - fascinating). So let me rephrase my question and feel free to rewrite it yourself if you can get where I'm leading. My question is basically this: if we send a single...

Thanks, DrChinese. Let me ask a few questions to try to understand what's happening. Let's say we shoot a single photon, which travels through the double slit, and then is split into entangled twins. The detectors are ON and the idler twin is detected as either having come through the left or...

Thanks so much, Nugatory - excellent article. I have a bunch of questions, if you can stick with me. I’ll start with two: 1) The article refers to “idler” and “signal” photons. Are these fundamentally different in any way, or is it just shorthand so we don’t have to say “the photon that reaches...

A laser provides a constant stream of photons which pass through a double-slit. The photon stream emerging from each slit then passes through a crystal which splits each photon into coherent entangled pairs. One photon from each pair heads towards a photosensitive screen and the entangled twin...