Researchers create first programmable, logical quantum processor

Individual physical qubits, like rubidium atoms, are notoriously fragile and easily disturbed by interactions with their environment. To minimize errors, researchers entangle the atoms together to form a single “logical qubit,” which can be combined with other logical qubits into a fault-tolerant quantum circuit. Credit: S. Kelley/NIST

Harvard researchers have realized a key milestone in the quest for stable, scalable quantum computing, an ultra-high-speed technology that will enable game-changing advances in a variety of fields, including medicine, science, and finance.

The team, led by Mikhail Lukin, the Joshua and Beth Friedman University Professor in physics and co-director of the …

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