A new way to manipulate quantum states resolves a long-standing conundrum about who knows what, and when and how, in the quantum world. The result is, as one has come to expect, startling and counterintuitive.
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Hayden, P. Putting certainty in the bank. Nature 436, 633–634 (2005). https://doi.org/10.1038/436633a
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DOI: https://doi.org/10.1038/436633a
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