Unconditional measurement-based quantum computation with optomechanical continuous variables
Unconditional measurement-based quantum computation with optomechanical continuous variables
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DOI：
10.1103/physreva.105.012610
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发表时间：
2018-09
影响因子：
2.9
通讯作者：
O. Houhou;Darren W. Moore;S. Bose;A. Ferraro
中科院分区：
文献类型：
--
作者：
O. Houhou;Darren W. Moore;S. Bose;A. Ferraro
通过对纠缠非高斯态的高斯测量，可以实现在连续变量上编码的普适量子计算。然而，由于可用的非线性的弱点，通常这些状态只能有条件地准备，可能具有低概率。在这里，我们展示了如何使用能够维持线性和二次光机械类相互作用的集成平台无条件地实现通用量子计算。具体而言，考虑到腔光和机电系统，我们提出了一个驱动耗散动力学的实现，确定性地准备所需的非高斯集群状态-纠缠压缩状态的多个机械振荡器适当地穿插与非高斯相位状态。接下来，我们将演示如何通过连续监测输出腔场来执行簇节点上的任意高斯测量。最后，这种方法的可行性要求进行了详细分析，表明其构件是在现有技术的范围内。
Universal quantum computation encoded over continuous variables can be achieved via Gaussian measurements acting on entangled non-Gaussian states. However, due to the weakness of available nonlinearities, generally these states can only be prepared conditionally, potentially with low probability. Here we show how universal quantum computation could be implemented unconditionally using an integrated platform able to sustain both linear and quadratic optomechanical-like interactions. Specifically, considering cavity opto- and electro-mechanical systems, we propose a realisation of a driven-dissipative dynamics that deterministically prepares the required non-Gaussian cluster states --- entangled squeezed states of multiple mechanical oscillators suitably interspersed with cubic-phase states. We next demonstrate how arbitrary Gaussian measurements on the cluster nodes can be performed by continuously monitoring the output cavity field. Finally, the feasibility requirements of this approach are analysed in detail, suggesting that its building blocks are within reach of current technology.