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
.
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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