Quantum computing offers great potential information processing power by harnessing the entanglement of many qubits in service of useful tasks. Getting from individual qubits to an actual working device is a major challenge, however: a large number of logic elements that store and manipulate qubits need to communicate over data channels without degrading. In a paper in Physical Review A, researchers from the MUSIQC (Modular Universal Scalable Ion-trap Quantum Computing) program, a multiuniversity effort lead by Duke University, confront this problem with a proposed modular quantum computing design that is scalable to a large number of qubits while remaining fault tolerant.
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