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Physicists force atoms into state of quantum 'hyper-entanglement' using tweezers made of laser light
By controlling individual atoms, researchers have demonstrated a way to turn previously unwanted atomic motion into an advantage.
"We show that atomic motion, which is typically treated as a source of unwanted noise in quantum systems, can be turned into a strength," said Adam Shaw in a statement on Caltech's website, a postdoctoral researcher and first author on the study. To achieve that state of hyper-entanglement, the team first had to cool an alkaline earth atom with no charge using a novel method that Endres said involved "detection and subsequent active correction of thermal motional excitations." The next step was to cause atoms to oscillate like a pendulum on a tiny scale in two different directions simultaneously, creating a state of superposition — when a particle exhibits opposite properties at the same time.
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