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This page has a good simple summary of the experiment, they present the following simple schematic of a delayed choice quantum eraser (the same as Figure 1 in the original paper by Kim et al.): In this case, if the entangled "idler photon" is detected by Alice at D3 or D4 then she will know whether the "signal photon" went through slit A or slit B, but if ...


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Different interpretations can sometimes have different predictions. For example, Bell's theorem says that no interpretation of quantum mechanics that is local can quantum mechanics predictions about certain entangled particles. However there many be no differences in predictions between pilot-waves and the standard interpretation. They seem to be ...


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It sounds like you are asking whether we can clone the qubits during the computation without affecting the original qubits. This would be useful but has been proved to be impossible. It is called the No Cloning theorem and is fundamental to quantum mechanics. No interpretation of quantum mechanics can circumvent it.


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MWI has issues with how the effect of a measurement causes the world (universe) to split into potentially an infinite number of copies of itself, each slightly different. How fast does the influence "rip" (tear?) through the Universe? At the speed of light? No, it would have to be faster otherwise ERP experiments would not work. So, instantaneously? But in ...


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I don't think there is a good answer to your question. For me, the fidelity is a distance measure (not a metric though). This means, it just tells you how "far" two states are from each other. The further they are away (e.g. the smaller the fidelity) the less they behave like each other, the closer the fidelity is to one, the better the states match. In ...


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Here are some random references out of the top of my head. I recommend chapter 8 of the book of Schlosshauer - Decoherence and the Quantum-To-Classical Transition. Also in favor of the MWI, see the book by David Wallace - The emergent multiverse, which addresses also open problems and discusses some criticisms. Also see: ...


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None of the interpretations are right or wrong, since they are interpretations of the same mathematical formalism which predict the same events. Interpretations are a philosophical adjunct that provides a "what is REALLY happening" view. If an interpretation is tested and shown to be wrong, then it is no longer an interpretation - just wrong physics. ...


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Addressing delayed choice (focusing on quantum phenomena): My simplified view is that setup of the apparatus (and other devices on the path) limits possible properties and paths of photons that may reach it, but, the photon (travelling @ c), makes the whole journey from emission to absorption (detection, collapse) in the very definition of an instant, even ...


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Don't let any tell you there would be no problem. In a MV snake eyes would come up the same as 7's rendering probability meaningless. In fact a few physicists have submitted papers that propose the universe must be destroyed soon so we can calculate finite equations. Thus fixing the odds. They seriously predict it must end soon or nothing will make sense. ...



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