Apparently IBM has hardwired a new error correcting algorithm into its new quantum chip called "Quantum Low-Density Parity Check" (qLDPC), only 288 physical Qubits are needed (provided the physical error rate is less than 0.1%) to produce 12 perfect logical cubits; with older error correction codes many thousands of physical Qubits would have been required. The difficult part was that for qLDPC to work each physical Qubit had to be connected to 6 other Qubits, in older quantum chips there was only a connection with two or three.
IBM releases first-ever 1,000-qubit quantum chip <https://www.nature.com/articles/d41586-023-03854-1> Unveiling IBM Quantum System Two <https://www.youtube.com/watch?v=Qndz54SGCAs> John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> ins -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv3Qj5RjxDA%3DKyxomzi3m%2B2qDv6xci1R2uUDiijuG9i4Ug%40mail.gmail.com.
