Symmetric Rydberg controlled- Z gates with adiabatic pulses
Symmetric Rydberg controlled- Z gates with adiabatic pulses
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DOI：
10.1103/physreva.101.062309
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
M. Saffman;I. Beterov;A. Dalal;E. Paez;B. Sanders
中科院分区：
文献类型：
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作者：
M. Saffman;I. Beterov;A. Dalal;E. Paez;B. Sanders
我们分析了基于绝热脉冲对称作用于两个原子的中性原子里德伯CZ门。利用光滑脉冲波形和Cs原子参数的分析预测，利用绝热快速通过（阿普）脉冲，该门可以产生保真度F>0.999的Bell态。利用全局优化的绝热脉冲形状，在双光子激发过程中，我们产生了保真度为${\mathcal F}=0.997$的Bell态。该分析充分考虑了中间态和里德伯态的自发辐射，包括室温环境下的里德伯寿命，但不包括激光噪声引起的误差。门协议不需要单独寻址，并显示出对由于原子运动的多普勒频移是强大的。
We analyze neutral atom Rydberg $C_Z$ gates based on adiabatic pulses applied symmetrically to both atoms. Analysis with smooth pulse shapes and Cs atom parameters predicts the gates can create Bell states with fidelity ${\mathcal F}>0.999$ using adiabatic rapid passage (ARP) pulses. With globally optimized adiabatic pulse shapes, in a two-photon excitation process, we generate Bell states with fidelity ${\mathcal F}=0.997$. The analysis fully accounts for spontaneous emission from intermediate and Rydberg states, including the Rydberg lifetime in a room temperature environment, but does not include errors arising from laser noise. The gate protocols do not require individual addressing and are shown to be robust against Doppler shifts due to atomic motion.