Quantum operations with 99% fidelity – the key to practical quantum computers

For the first time in silicon, a team of engineers led by Andrea Morello at UNSW Sydney has demonstrated a three-qubit quantum processor in silicon where every operation – one-qubit logic, two-qubit logic, and qubit initialisation and measurement – is performed with better than 99% fidelity.

Quantum operations with better than 99% fidelity were also demonstrated in two similar experiments at TU Delft and RIKEN, signalling the global maturity of quantum information processing in silicon.

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