论文标题
使用基于MEMS的光束转向系统进行单个量子误处理的高保真两倍的门
High-fidelity Two-qubit Gates Using a MEMS-based Beam Steering System for Individual Qubit Addressing
论文作者
论文摘要
在一个大规模捕获的原子离子量子计算机中，需要在所有量子位上扩展高保真两个Quibenty的门。我们意识到并表征了使用径向模式最多4个离子的系统中的高保真两个Quibent的大门。离子是由使用微电动系统（MEMS）镜子引导的两个紧密聚焦的光束分别解决的。我们通过施加多达21个两倍的门的序列并测量最终状态保真度，从而推断出两离子链中的栅极保真度为99.49（7）％和四离子链中的99.30（6）％。我们表征了残余误差，并讨论了进一步提高与耐故障量子计算兼容的值的门的忠诚度的方法。
In a large scale trapped atomic ion quantum computer, high-fidelity two-qubit gates need to be extended over all qubits with individual control. We realize and characterize high-fidelity two-qubit gates in a system with up to 4 ions using radial modes. The ions are individually addressed by two tightly focused beams steered using micro-electromechanical system (MEMS) mirrors. We deduce a gate fidelity of 99.49(7)% in a two-ion chain and 99.30(6)% in a four-ion chain by applying a sequence of up to 21 two-qubit gates and measuring the final state fidelity. We characterize the residual errors and discuss methods to further improve the gate fidelity towards values that are compatible with fault-tolerant quantum computation.
