Quantum Eraser and Delayed Choice Quantum Eraser

[thenewmans]

I have read that these experiments have been successful and do not cause a disagreement with QM. But I can’t quite determine what was learned. So what did they prove or disprove? Is there a simple explanation? I thought they were designed to determine if wave collapse breaks either locality or causality? (Non-Locality – instant action at a distance. Non-Causality – action goes back in time. I think I have that part right.) It should be one or the other, right?

 

[thenewmans]

(Oops, I hope I didn’t ask a question that was answered in that other Quantum Eraser thread. Sorry if I committed a PF faux pas.)

 

[Entropia]

I can understand that the concepts of the Quantum Eraser and Delayed Choice Quantum Eraser experiments may be difficult to grasp at first. These experiments were designed to test the principles of quantum mechanics, specifically the concept of wave-particle duality and the role of observation in determining the behavior of particles.

What these experiments have shown is that the behavior of particles can be influenced by the way we choose to observe them. In the Quantum Eraser experiment, the presence of a detector can cause a particle to behave as a particle rather than a wave, while in the Delayed Choice Quantum Eraser, the decision to measure or not measure a particle after it has already passed through a double-slit experiment can affect its behavior.

These experiments do not disprove quantum mechanics, but rather provide further evidence for its principles. They show that the nature of reality at the quantum level is inherently probabilistic and that the act of observation plays a crucial role in determining the outcome of an experiment.

As for the concepts of locality and causality, these experiments do not necessarily challenge them. The results of these experiments can be explained without the need for non-locality or non-causality, as they can be understood within the framework of quantum mechanics.

In summary, these experiments have provided valuable insights into the fundamental principles of quantum mechanics and have further solidified our understanding of the quantum world. While they may seem confusing at first, they have not disproven any established principles, but rather expanded our knowledge and opened new avenues for exploration in the field of quantum mechanics.