论文标题
量子门忠诚对激光相和强度噪声的敏感性
Sensitivity of quantum gate fidelity to laser phase and intensity noise
论文作者
论文摘要
中性原子Qubits上的栅极操作的保真度通常受到激光驱动器的波动的限制。在这里，我们量化了量子栅极保真度对激光相和强度噪声的敏感性。我们首先开发模型以识别激光自构噪声光谱中观察到的特征，重点是白噪声和伺服凸起的效果。在稳定激光器的特征的弱噪声状态中，我们表明，基于主方程的扰动解的分析理论与包含相位噪声的数值模拟非常吻合。我们计算单次和两光子狂犬病振荡的量子门忠诚度，并表明可以通过相对于光谱噪声峰进行适当选择Rabi频率来增强它们。我们还分析了小于狂犬病频率的光谱支持的强度噪声的影响。我们的结果确定了实现所需的门忠诚所需的激光噪声水平的要求。
The fidelity of gate operations on neutral atom qubits is often limited by fluctuations of the laser drive. Here, we quantify the sensitivity of quantum gate fidelities to laser phase and intensity noise. We first develop models to identify features observed in laser self-heterodyne noise spectra, focusing on the effects of white noise and servo bumps. In the weak-noise regime, characteristic of well-stabilized lasers, we show that an analytical theory based on a perturbative solution of a master equation agrees very well with numerical simulations that incorporate phase noise. We compute quantum gate fidelities for one- and two-photon Rabi oscillations and show that they can be enhanced by an appropriate choice of Rabi frequency relative to spectral noise peaks. We also analyze the influence of intensity noise with spectral support smaller than the Rabi frequency. Our results establish requirements on laser noise levels needed to achieve desired gate fidelities.
