Entanglement recovery in noisy binary quantum information protocols via three-qubit quantum error correction codes

The task of preserving entanglement against noises is crucial importance for both quantum communication and information transfer. To this aim, error correction (QEC) codes may be employed to compensate, at least partially, the detriments induced by environmental noise that can modelled as a bit-flip or phase-flip channel. In paper we investigate effects simple three-qubit QEC restore nonlocality in two-qubit system consider two practical applications: superdense coding teleportation. Though considered are known perfectly work presence very small noise, show they avoid sudden death improve performance addressed protocols also larger amplitudes.