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Viewers of Quantum Events Are Also Subject to Uncertainty
The reference frames from which observers view quantum events can themselves have multiple possible locations at once—an insight with potentially major ramifications.
The idea of reference frames has a storied history in classical physics: Isaac Newton, Galileo, and Albert Einstein all relied on them for their studies of motion. Einstein used reference frames to develop his theories of relativity, which revealed that space and time are not fixed backdrops to the universe, but rather elastic entities that can stretch, scrunch, and warp. For example, the physicists Chiara Marletto and Vlatko Vedral of the University of Oxford have proposed putting two masses each in a superposition of two locations and then studying how this affects their gravitational fields.
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