PhysicsWhy John Stewart Bell has been haunting quantum mechanics for decades The “Bell test” was devised in the 1960s to uncover what’s going on in the quantum world, but it continues to be relevant today, says Karmela Padavic-Callaghan Comment
TechnologyBreaking encryption with a quantum computer just got 20 times easier A quantum computer with a million qubits would be able to crack the vital RSA encryption algorithm, and while such machines don't yet exist, that estimate could still fall further News