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The Human Eye Could Help Test Quantum Mechanics

Rather than simply sending single photons toward a volunteer’s eye through either the left or the right fiber, the idea is to send photons in a quantum superposition of effectively traversing both fibers at once. Will humans see any difference? According to standard quantum mechanics, they will not — but such a test has never been done. If Paul Kwiat’s team produces conclusive results showing otherwise, it would question our current understanding of the quantum world, opening the door to alternative theories that argue for a dramatically different view of nature in which reality exists regardless of observations or observers, cutting against the grain of how quantum mechanics is interpreted today.

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