Menicucci Nicolas C, van Loock Peter, Gu Mile, Weedbrook Christian, Ralph Timothy C, Nielsen Michael A
Department of Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
Phys Rev Lett. 2006 Sep 15;97(11):110501. doi: 10.1103/PhysRevLett.97.110501. Epub 2006 Sep 13.
We describe a generalization of the cluster-state model of quantum computation to continuous-variable systems, along with a proposal for an optical implementation using squeezed-light sources, linear optics, and homodyne detection. For universal quantum computation, a nonlinear element is required. This can be satisfied by adding to the toolbox any single-mode non-Gaussian measurement, while the initial cluster state itself remains Gaussian. Homodyne detection alone suffices to perform an arbitrary multimode Gaussian transformation via the cluster state. We also propose an experiment to demonstrate cluster-based error reduction when implementing Gaussian operations.
我们描述了量子计算的簇态模型到连续变量系统的一种推广，以及一种使用压缩光源、线性光学和零差检测的光学实现方案。对于通用量子计算，需要一个非线性元件。这可以通过在工具包中添加任何单模非高斯测量来满足，而初始簇态本身仍然是高斯的。仅零差检测就足以通过簇态执行任意多模高斯变换。我们还提出了一个实验，以证明在实现高斯操作时基于簇的误差降低。
