Quantum computing qubit quantum error correction Quantum supremacy entanglement non-local silicon MIT IBM computer computing bit
Quantum computing is an emerging technology in the field of computing. MIT Technology Review reported 10 November 2017 that IBM has created a 50-qubit computer; currently its quantum state lasts 50 microseconds. Google researchers have been able to extend the 50 microsecond time limit, as reported 14 July 2021 in Nature; stability has been extended 100-fold by spreading a single logical qubit over chains of data qubits for quantum error correction. Physical Review X reported a technique for 'single-gate sensing as a viable readout method for spin qubits' (a singlet-triplet spin state in silicon) on 26 November 2018. A Google team has succeeded in operating their RF pulse modulator chip at 3 Kelvin, simplifying the cryogenics of their 72-qubit computer, which is set up to operate at 0.3 Kelvin; but the readout circuitry and another driver remain to be brought into the cryogenics. See: Quantum supremacy Silicon qubit systems have demonstrated entanglement at non-local distances.
