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… When using their microscope to hunt for the Majorana, however, the researchers were at first perplexed by what they saw. Some of the time they saw the Majorana appear, and other times they could not find it. After further exploration they realized that the Majorana only appears when the small magnets are magnetized in the direction parallel to the direction of electron flow along the channel.
"When we began to characterize the small magnets, we realized they are the control parameter," said Yazdani. "The way the magnetization of the bit is oriented determines whether the Majorana appears or not. It is an on-off switch." ...
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