Quantum computing has immense potential but incredible complexities. While zealots claim it will cure cancer and save the planet, critics warn their promises are far from being fulfilled. One of their key challenges lies at the very heart of the field: ​​quantum bits, or “qubits.” These units of information are the quantum analog of binary bits in classical computers. To make quantum computers useful, the qubits have to be reliably controlled and manufactured at scale. It’s a requirement that still confounds the world’s leading computer scientists. The likes of IBM and Google made impressive strides by building qubits into their…

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