Stark-switching technique for fast quantum gates in Rydberg atoms
Stark-switching technique for fast quantum gates in Rydberg atoms
复制标题
里德堡原子中快速量子门的斯塔克开关技术
DOI：
10.1088/0953-4075/36/2/310
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
I. Beterov
中科院分区：
文献类型：
--
作者：
I. Ryabtsev;D. Tretyakov;I. Beterov
本文报道了钠里德伯原子37 S_（1/2）→ 37 P_（1/2）微波跃迁的Ramsey干涉测量实验。里德伯原子与连续波微波辐射的相互作用被一个弱（<1 V cm−1）电场脉冲有效地控制，该脉冲控制了70 050 MHz附近的跃迁频率。该脉冲使微波辐射从精确共振失谐，并由于二次斯塔克位移而导致里德堡态波函数的附加相位。结果，在扫描微波场的频率和扫描电场脉冲的强度时都可以观察到拉姆齐条纹。实验证明，这种斯塔克开关技术可以快速有效地控制原子与光的相互作用，并保持原子的相干性。这种技术在量子计算机实验中的可能应用进行了讨论。
An experiment on Ramsey interferometry of the 37S1/2 → 37P1/2 microwave transition in sodium Rydberg atoms has been performed. Interaction of Rydberg atoms with a cw microwave radiation was effectively controlled by a pulse of weak (<1 V cm−1) electric field, that manipulated the transition frequency near 70 050 MHz. The pulse detuned the microwave radiation from exact resonance, and induced additional phases to the wavefunctions of Rydberg states due to the quadratic Stark shifts. As a result, the Ramsey fringes were observable both on scanning the frequency of the microwave field and on scanning the strength of the electric field pulse. The experiment confirmed that this Stark-switching technique provides a fast and effective control of the atom–light interactions, and preserves the atomic coherence. Possible applications of this technique to experiments on quantum computers are discussed.