Kurzweilai.net has an article on the possible recent discovery of “Majorana fermions” — particles that "would be right on the border between matter and antimatter."
Some theories even suggest that these particles may ultimately provide the explanation for Dark Matter. Also, the article suggests that "Majorana fermions could be fundamental building blocks for a future quantum computer that would be exceptionally stable and barely sensitive to external influences. This would avoid the central problem with all current quantum computers: the dreaded decoherence."
The Kurzweilai.net article is based on this paper published last week in Science Express.
This video summarizes the experiment leading to the discovery:
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