Error correction of the continuous-variable quantum hybrid computation on two-node cluster states: Limit of squeezing

In this paper, we investigate the error correction of universal Gaussian transformations obtained in process continuous-variable quantum computations. We have tried to bring our theoretical studies closer actual picture experiment. When investigating procedure, considered that both resource GKP state itself and entanglement transformation are imperfect. reality, has a finite width associated with degree squeezing, is performed error. hybrid scheme implement transformations. scheme, realized through computations on cluster state, supplemented by linear optical operation. This gives smallest implementation The use such made it possible reduce oscillator squeezing threshold required for implementing fault-tolerant computation schemes close reality -19.25 dB.