离子阱量子计算规模化的研究进展

离子阱系统是当前实现量子计算最为领先的物理系统之一,已经在数十量子比特的规模下实现了保真度达到容错量子计算阈值的量子态制备、测量、通用量子逻辑门等基本量子操作.未来离子阱量子计算的一个重要研究方向,是在保持量子比特高性能的同时,进一步扩展量子比特的数量,最终达到解决实际问题所需的规模.本文介绍当前离子阱量子计算研究中主流的规模化方案,如离子输运方案和离子-光子量子网络方案等,以及各方案中存在的限制因素,进而探讨如二维离子阵列、双重量子比特等新的规模化方案及其前景.     

Probing a Dissipative Phase Transition with a Trapped Ion through Reservoir Engineering

Dissipation is often considered as a detrimental effect in quantum systems for unitary quantum operations.However, it has been shown that suitable dissipation can be useful resources in both quantum information and quantum simulation. Here, we propose and experimentally simulate a dissipative phase transition(DPT) model using a single trapped ion with an engineered reservoir. We show that the ion’s spatial oscillation mode reaches a steady state after the alternating application of unitary evolu...