A single post-selected measurement on an auxiliary qubit can purify arbitrary logical states of quantum error correcting codes to unit fidelity from thermal states, if a target-specific engineered interaction is available.
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Developing universal logical state-purification strategy for quantum error correcting codes
A single post-selected measurement on an auxiliary qubit can purify arbitrary logical states of quantum error correcting codes to unit fidelity from thermal states, if a target-specific engineered interaction is available.