Microsoft Majorana 2 quantum chip: physicists question functionality (scientificamerican.com)

• Microsoft announces Majorana 2 chip with lead superconductor.
• Physicists doubt validity due to lack of reproducibility.
• Previous publications retracted; current preprint not peer-reviewed.

"Microsoft announced an upgraded Majorana 2 quantum chip, but external experts say the claims remain unsubstantiated. The company reports a qubit lifetime of 20 seconds to one minute, but published data allegedly come from a single device. Previous works have been retracted, and physicists criticize the lack of reproducibility."