Delayed Choice Quantum Eraser Experiment Explained
Why Physics Stack Exchange recommends it
Physics Stack Exchange question askers cite it as the popular description of the delayed choice quantum eraser that prompts their own follow-up questions about the experiment.
Recommended by 0 people across 0 different months, 2019 to 2020.
What it is
An 11-minute explainer from the InspiringPhilosophy channel that walks through the delayed choice quantum eraser experiment, including the Kim-Scully setup, and discusses its supposedly strange implications about time and observation. The description cites arXiv papers and notes that two physicists reviewed it after upload.
Cited in 1 Wikipedia article, including Delayed-choice quantum eraser.
What people said
Cites user3179196 · 2019-07 · Physics Stack Exchange · on “Delayed Choice Quantum Eraser with one additional detector at the slits?”
Please take a look at this experiment [LINK] . You can also look at this youtube video [this video] describing the same experiment. What would be the result of the experiment above at D1, D2, D3 and D4, if I put a detector at both slits so that the "which way" information is detected immediately at the slits? See the picture below for clarification: [LINK]
Cites Connor McCormick · 2019-10 · Physics Stack Exchange · on “What Prevents Delayed Choice Quantum Eraser Experiment from Being Used to Predict the Future?”
Reading about the DCQE experiment commentary by Ross Rhodes [LINK] . My question is: why can't information about the future state of the idler photon (the one that heads toward the Glen-Thompson prism) be gleaned from the D0 detector in order to enable "predictions" of the future? I'll preempt any "because that would violate conservation of quantum information" responses by saying, yeah, that's why I'm asking this question. I'm certain there is something I don't understand and I'm hoping someone can help me understand it. I've seen these other questions: Can post-selecting on the screen in the Delayed Choice Quantum Eraser experiment be used to predict the quantum-eraser measurement results?
Cites Ilya Gazman · 2020-05 · Physics Stack Exchange · on “Can we use quantum physics to detect life outside our planet?”
I was watching a video about "delayed choice quantum eraser experiment", it shows how our knowledge about the system can change past events if they have not been measured yet. I would like to ask about the thought experiment at 10:26 [this video] What if the astronomer chooses to use a screen-type of light projector that accompanies both sides of the surrounding space without focusing on a specific region, in such case, no one knows the path the photon took and he should get an interference pattern. But what if at the same time another astronomer chooses to use a binocular pariah, and discovered what path the electron choose? In such a case, the first astronomer should get a clumped pattern. Now