论文标题
通过局部声子模式激发大离子晶体的强大门设计
Robust gate design for large ion crystals through excitation of local phonon modes
论文作者
论文摘要
我们提出了具有以下理想特征的大离子晶体的纠缠量子门的可扩展设计：1）栅极设计是通用的，适用于任意尺寸的大离子晶体； 2）门没有速度限制，可以在羔羊dicke地区以外工作； 3）栅极通过从连续波或脉冲激光束行驶而运行； 4）栅极对激光光相的缓慢变化不敏感，并且在热状态下可用于离子运动； 5）在现实的实验参数下，可以将固有的栅极不忠性降低到低于易于断层量子计算的阈值的水平。与以前的门方案不同，我们在这里提出了一个基于离子局部振荡模式的栅极设计，而不是集体的正常模式，并基于Heisenberg方程开发形式主义，以处理Lamb-Dicke地区以外的多体量子动力学。
We propose a scalable design of entangling quantum gates for large ion crystals with the following desirable features: 1) The gate design is universal and applicable for large ion crystals of arbitrary sizes; 2) The gate has no speed limitation and can work outside of the Lamb-Dicke region; 3) The gate operates by driving from either continuous-wave or pulsed laser beams; 4) The gate is insensitive to slow variation of the laser optical phase and works under a thermal state for the ions' motion; 5) The intrinsic gate infidelity can be reduced to a level well below the threshold for fault-tolerant quantum computation under realistic experimental parameters. Different from the previous gate schemes, here we propose a gate design based on driving of the local oscillation mode of the ions instead of the collective normal modes and develop a formalism based on the Heisenberg equations to deal with the many-body quantum dynamics outside of the Lamb-Dicke region.
