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Don't blink. Blink and you're dead. They are fast. Faster than you can believe. Don't turn your back. Don't look away. And… don't… BLINK. Good Luck.
The quantum Zeno effect (also known as the Turing paradox) is a situation in which an unstable particle, if observations are repeatedly made i.e., by shining a laser on the sample to take its measurement under a microscope or using some other form of atomic measurement, the unstable particle will never decay. Sometimes this is stated as "a system can't change while you are watching it." One can "freeze" the evolution of the system by measuring it frequently enough in its known initial state. The meaning of the term has since expanded, leading to a more technical definition in which time evolution can be suppressed not only by measurement: the quantum Zeno effect is the suppression of unitary time evolution in quantum systems provided by a variety of sources: measurement, interactions with the environment, stochastic fields, and so on.
In the non-intuitive quantum domain, the phenomenon of counterfactuality is defined as the transfer of a quantum state from one site to another without any quantum or classical particle transmitted between them. Counterfactuality requires a quantum channel between sites, which means that there exists a tiny probability that a quantum particle will cross the channel—in that event, the run of the system is discarded and a new one begins. It works because of the wave-particle duality that is fundamental to particle physics: Particles can be described by wave function alone.
Well understood as a workable scheme by physicists, theoretical aspects of counterfactual communication have appeared in journals, but until recently, there have been no practical demonstrations of the phenomenon. Now, a collaborative of Chinese scientists has designed and experimentally tested a counterfactual communication system that successfully transferred a monochrome bitmap from one location to another using a nested version of the quantum Zeno effect.
The Weeping Angels were an extremely powerful species of quantum-locked humanoids (sufficient observation changes the thing being observed), so called because their unique nature necessitated that they often covered their faces with their hands to prevent trapping each other in petrified form for eternity by looking at one another. This gave the Weeping Angels their distinct "weeping" appearance.
the experimenter continues to exist through all of their superpositions where the outcome of the experiment is that they live. In other words, we may say that the experimenter survives all iterations of the experiment, whichever its number. Since the superpositions where the experimenter lives occur by quantum necessity (again, under the many-worlds interpretation), it follows that their survival, after any realizable number of iterations, is physically necessary; hence, the notion of quantum immortality.