npj Quantum Information ( IF 6.6 ) Pub Date : 2024-02-23 , DOI: 10.1038/s41534-024-00816-x Kimin Park , Radim Filip
Continuous-variable (CV) quantum information processing harnesses versatile experimental tools that leverage the power of infinite-dimensional oscillators controlled by a single qubit. Increasingly available elementary Rabi gates have been proposed as a resource for implementing universal CV gates, but the requirement of many weak, non-commuting gates is a bottleneck in scaling up such an approach. In this study, we propose a resource-efficient technique using Fourier expansion to implement arbitrary non-linear phase gates in a single oscillator. This method reduces the number of sequentially required gates exponentially. These gates represented by cubic, quartic, and other arbitrary nonlinear potentials have applications in CV quantum information processing with infinite-dimensional oscillators controlled by a single qubit. Our method outperforms previous approaches and enables the experimental realization of a wide range of applications, including the development of bosonic quantum sensors, simulations, and computation using trapped ions and superconducting circuits.
中文翻译:
高效玻色子非线性相位门
连续变量 (CV) 量子信息处理利用多功能实验工具,利用单个量子位控制的无限维振荡器的力量。越来越多可用的基本拉比门已被提议作为实现通用 CV 门的资源,但许多弱的非交换门的需求是扩大这种方法的瓶颈。在本研究中,我们提出了一种利用傅立叶展开的资源高效技术,在单个振荡器中实现任意非线性相位门。该方法以指数方式减少了顺序所需的门的数量。这些由三次、四次和其他任意非线性势表示的门在 CV 量子信息处理中具有由单个量子位控制的无限维振荡器的应用。我们的方法优于以前的方法,并且能够实验实现广泛的应用,包括玻色子量子传感器的开发、使用捕获离子和超导电路进行模拟和计算。