Tracking photon jumps with repeated quantum non-demolition parity measurements.


Quantum error correction is required for a practical quantum computer because of the fragile nature of quantum information. In quantum error correction, information is redundantly stored in a large quantum state space and one or more observables must be monitored to reveal the occurrence of an error, without disturbing the information encoded in an unknown… (More)
DOI: 10.1038/nature13436


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