Two-qubit entanglement can be preserved by partially measuring the qubits to leave them in a 'lethargic' state. The original state is restored using quantum measurement reversal after the qubits have travelled through a decoherence channel.
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Korotkov, A. The Sleeping Beauty approach. Nature Phys 8, 107–108 (2012). https://doi.org/10.1038/nphys2209
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DOI: https://doi.org/10.1038/nphys2209
