Interesting, recall the announcement then, mostly technical points are made here, but worth noting. Not clear then hw this will effect Microsoft's work in the space, if at all.
Microsoft’s Big Win in Quantum Computing Was an ‘Error’ After All By Wired in ACM
In March 2018, Dutch physicist and Microsoft employee Leo Kouwenhoven published headline-grabbing new evidence that he had observed an elusive particle called a Majorana fermion.
Microsoft hoped to harness Majorana particles to build a quantum computer, which promises unprecedented power by tapping quirky physics. Rivals IBM and Google had already built impressive prototypes using more established technology. Kouwenhoven's discovery buoyed Microsoft's chance to catch up. The company's director of quantum computing business development, Julie Love, told the BBC that Microsoft would have a commercial quantum computer "within five years."
Three years later, Microsoft's 2018 physics fillip has fizzled. Late last month, Kouwenhoven and his 21 coauthors released a new paper including more data from their experiments. It concludes that they did not find the prized particle after all. An attached note from the authors said the original paper, in the prestigious journal Nature, would be retracted, citing "technical errors." ... '
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