PhysicsWhy it might be impossible to build a practical quantum computer After “quantum supremacy”, the next step is scaling up and mastering the errors that dog qubits. But some researchers reckon the noise might always to be too high for useful quantum computers Features
PhysicsInvestigation of Nazi uranium could help stop modern nuclear smuggling Cubes of uranium salvaged from Nazi Germany's atomic bomb programme during the second world war are being analysed to confirm their origin, and the method could help law enforcement investigate illegal trafficking of nuclear material èƵ