Researchers Bring Quantum Chaos Under Control Across 100 Qubits

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Quantum computers have to continuously monitor trouble-prone states if they are to expect reliably in the future. An experiment with up to 100 qubits now shows that repeated measurements and targeted resets can convert chaotic quantum dynamics into a controllable state. This is an important building block for error correction, but does not replace a fault-tolerant quantum computer. Piscataway (U.S.A.). Quantum computers use physical states, [...…

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A quantum computer is chaos, which we are forced to control. But how? Researchers have shown that this is possible even while its processor is running. In an experiment involving up to 100 qubits, regular measurements and subsequent resets allowed the entire system to steer toward the desired state.