Quantum Immortality. A simplified Model of the thought experiment, attributed to David Bohm, considers the decay of the particle called the pi meson. When this particle decays, it makes an electron and also a positron that have opposite spin and they are going far from each other. As an example, https://directoryrec.com/listings286981/quantum-field-theory-the-smart-trick-of-quantum-fiber-that-nobody-is-discussing