论文标题
强大的振荡器介导的相位门由低强度脉冲驱动
Robust Oscillator-Mediated Phase Gates Driven by Low-Intensity Pulses
论文作者
论文摘要
由骨值模式介导的强大Qubit量相互作用对于许多量子技术都是核心。现有的提案将快速振荡器介导的门与动态脱钩结合使用，需要强脉冲或对Qubit-Boson耦合的快速控制。在这里，我们提出了一种基于动力学去耦技术的方法，该方法导致具有低强度脉冲的缠结大门更快。我们的方法是一般的，即，它适用于通过纵向耦合与骨器介体相互作用的量子平台的任何量子平台。此外，该协议为量子频率和控制场的波动提供了鲁棒性，同时也对常见误差（例如频率移动和介体中的加热以及串扰效应）具有抵抗力。我们用通过磁场梯度耦合的被困离子的实现来说明我们的方法。通过详细的数值模拟，我们表明，在当前或接近近距离的实验设置中，可能性可能是$ 10^{ - 3} $或$ 10^{ - 4} $的纠缠门。
Robust qubit-qubit interactions mediated by bosonic modes are central to many quantum technologies. Existing proposals combining fast oscillator-mediated gates with dynamical decoupling require strong pulses or fast control over the qubit-boson coupling. Here, we present a method based on dynamical decoupling techniques that leads to faster-than-dispersive entanglement gates with low-intensity pulses. Our method is general, i.e., it is applicable to any quantum platform that has qubits interacting with bosonic mediators via longitudinal coupling. Moreover, the protocol provides robustness to fluctuations in qubit frequencies and control fields, while also being resistant to common errors such as frequency shifts and heating in the mediator as well as crosstalk effects. We illustrate our method with an implementation for trapped ions coupled via magnetic field gradients. With detailed numerical simulations, we show that entanglement gates with infidelities of $10^{-3}$ or $10^{-4}$ are possible with current or near-future experimental setups, respectively.
