论文标题
门的忠诚度，倾向和“魔术”诱捕光学捕获的中性原子
Gate fidelity, dephasing, and "magic" trapping of optically trapped neutral atom
论文作者
论文摘要
栅极操作的保真度和被困在光学偶极陷阱中的中性原子的相干时间是应用的功绩。被困原子的运动是影响门忠诚度和连贯性时间的关键因素之一。该运动被认为是分析影响的经典振荡器。在这里，我们将原子的运动视为量子振荡器。在分析栅极的忠诚度和脱碳时，考虑了原子振动状态上的种群。我们表明，相干旋转门的保真度受热捕获原子的温度极为限制。我们还表明，如果原子的热运动引起的两个超细状态之间的脱位可以自然地重现，如果差异频率稳定并且振动状态不变。还讨论了由于陷阱激光强度的波动而引起的破坏。通过将原子冷却到振动基态和/或使用蓝色遗传的陷阱中，可以通过将原子冷却到振动基态和/或来大大增强栅极的保真度和相干时间。更重要的是，我们通过将原子准备成特定的振动状态来提出“魔术”捕获条件。
The fidelity of the gate operation and the coherence time of neutral atoms trapped in an optical dipole trap are figures of merit for the applications. The motion of the trapped atom is one of the key factors which influence the gate fidelity and coherence time. The motion has been considered as a classical oscillator in analyzing the influence. Here we treat the motion of the atom as a quantum oscillator. The population on the vibrational states of the atom are considered in analyzing the gate fidelity and decoherence. We show that the fidelity of a coherent rotation gate is dramatically limited by the temperature of a thermally trapped atom. We also show that the dephasing between the two hyperfine states due to the thermal motion of the atom could rephase naturally if the differential frequency shift is stable and the vibrational states do not change. The decoherence due to the fluctuations of the trap laser intensity is also discussed. Both the gate fidelity and coherence time can be dramatically enhanced by cooling the atom into vibrational ground states and/or by using a blue-detuned trap. More importantly, we propose a "magic" trapping condition by preparing the atom into specific vibrational states.
