论文标题
富达的空间依赖性对两倍的rydberg-blockade量子门
Spatial dependence of fidelity for a two-qubit Rydberg-blockade quantum gate
论文作者
论文摘要
我们研究了H. Levine等人提出的纠缠门的空间性能。 （物理学修订版123，170503（2019））。该门基于Rydberg封锁技术，仅由两种全球激光脉冲组成，它们驱动附近的原子。我们使用特定的驱动光束几何形状和极化分析了相互作用的$^{87} $ rb rydberg原子的多级Zeeman结构，并分析了两个实验可用的激发方案。特别是，我们估计了相对于量化轴的原子间距离和角度的封锁移位依赖性。此外，我们表明，与$ s $ states相比，使用Rydberg $ d $ states会导致封锁偏移和门忠诚度的显着依赖性。
We study the spatial performance of the entangling gate proposed by H. Levine et al. (Phys. Rev. Lett. 123, 170503 (2019)). This gate is based on a Rydberg blockade technique and consists of just two global laser pulses which drive nearby atoms. We analyze the multilevel Zeeman structure of interacting $^{87}$Rb Rydberg atoms and model two experimentally available excitation schemes using specific driving beams geometry and polarization. In particular, we estimate the blockade shift dependence on inter-atomic distance and angle with respect to the quantization axis. In addition, we show that using Rydberg $d$-states, in contrast to $s$-states, leads to a pronounced angular dependence of the blockade shift and gate fidelity.
