Robust fault tolerance for continuous-variable cluster states with excess antisqueezing
Robust fault tolerance for continuous-variable cluster states with excess antisqueezing
复制标题
具有过度抗挤压的连续变量集群状态的鲁棒容错能力
作者：
Blayney W. Walshe;Lucas J. Mensen;B. Baragiola;N. Menicucci
连续变量团簇状态的巨大可扩展性激发了他们作为量子计算平台的研究，在充分压缩和适当编码的量子位的情况下，容错是可能的[Menicucci，PRL 112，120504（2014）]。在这里，我们通过证明额外的反压缩对容错阈值没有影响来扩展该结果的范围，从而消除了实验连续变量簇态量子计算的纯度要求。我们强调，容错应用程序的适当的实验目标是直接测量15-17 dB的压缩在集群状态，而不是更保守的上限20.5 dB。
The immense scalability of continuous-variable cluster states motivates their study as a platform for quantum computing, with fault tolerance possible given sufficient squeezing and appropriately encoded qubits [Menicucci, PRL 112, 120504 (2014)]. Here, we expand the scope of that result by showing that additional anti-squeezing has no effect on the fault-tolerance threshold, removing the purity requirement for experimental continuous-variable cluster-state quantum computing. We emphasize that the appropriate experimental target for fault-tolerant applications is to directly measure 15-17 dB of squeezing in the cluster state rather than the more conservative upper bound of 20.5 dB.