Quantum Computing

Most record-setting spin qubits start with silicon that has had one of its own isotopes taken out. About one silicon atom in 20 is silicon-29, the element's only stable isotope with a magnetic…

Picture an ant trying to walk a trail while a herd of elephants stampedes down the same path. That is roughly the problem Prem Kumar and his group at Northwestern set themselves, and the ant,…

Every quantum computer that corrects its own errors is running a race against itself. The hardware measures its qubits over and over, thousands of times a second, and each round produces a small…