Feedback compensation tests whether measurement results fit their physical reality (IMAGE)
Caption
It is hard to know whether a quantum measurement is precise or not. Feedback compensation directly compares the measurement result with an "imprint" of the original left in a weak interaction. It is a bit like trying on shoes - you can tell whether the shoe fits or not, and a good fit confirms the result of your measurement. In quantum mechanics, it is possible to get a good fit from completely different measurements. The newly reported results show that the dependence of reality on the measurement is an experimentally testable fact.
Credit
Holger Friedrich Hofmann, Hiroshima University
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