Why 'qudits' (not qubits) may be the key to quantum computing

Quantum computers may promise a giant leap forward in performance and efficiency, but none of that can happen until we figure out a practical way to build them. Russian scientists just announced what they say is a major advance.Building quantum computers is difficult because the qubits they're made with tend to be highly unstable. Qubits are the quantum counterpart of the bits used in traditional computing. While traditional bits represent data as 0s or 1s, qubits are distinguished by what'