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Quantum computing
Quantum computing, explained from the hardware upward
A rigorous guide to qubits, gates, processors, error correction and the evidence required for useful computation.
From physical qubits to logical systems
Quantum processors manipulate fragile physical states. Useful systems must control noise, connectivity and measurement while protecting logical information.
How to assess progress
Compare gate fidelity, circuit depth, logical error rates and complete resource estimates—not physical qubit counts alone.
What remains open
Fault-tolerant scale, practical workloads and end-to-end advantage remain active research questions.
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