Delayed Choice
Wheeler's delayed choice experiment, like the quantum eraser, and the Mach-Zender interferometer, involves a superposition of two quantum states similar to those in entanglement, the two-slit experiment, and Schrödinger's Cat.
In the delayed choice experiment, events that happened in the distant past appear to be changed.
Wheeler
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These weird
phenomena are described in many popular books that misunderstand or misinterpret what quantum particles and quantum wave functions are actually or "really" doing. While "nobody understands quantum mechanics," as Richard Feynman famously said, we hope to explain how Albert Einstein's "spooky action at a distance" has given rise to the amazing new technologies of the "second quantum revolution."
These "quantum resources" include the generation of quantum random bit strings used as unbreakable cryptographic codes ("") for secure communications, and the entangled "qubits" that may become the basis for quantum computing.
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