Quantum Xtralite Rod. A simplified Model of the imagined experiment, attributed to David Bohm, considers the decay of the particle called the pi meson. When this particle decays, it makes an electron as well as a positron which have opposite spin and so are moving faraway from one another. Plus https://a-listdirectory.com/listings12767378/quantum-meaning-the-definitive-guide-to-quantum-immortality