论文标题
使用自旋依赖的挤压稳健的两量四分之一的被困的离子大门
Robust two-qubit trapped ions gates using spin-dependent squeezing
论文作者
论文摘要
纠缠大门是量子计算机的重要组成部分。但是，以可扩展的方式生成高保真门仍然是所有量子信息处理平台中的主要挑战。因此，近年来，改善这些大门的忠诚度和鲁棒性一直是研究重点。在捕获的离子量子计算机中，纠缠门是通过驱动离子链运动模式而产生旋转依赖力的正常运动模式来执行的。尽管在增加这些门的鲁棒性和模块化方面取得了重大进展，但它们仍然对驱动场强度的噪声仍然敏感。在这里，我们通过旋转依赖性挤压来补充传统的自旋依赖性位移，这使一个门能够在驱动场的振幅中偏离偏差。我们通过分析地解决了哈密顿官和工程师的频谱。我们还赋予了其他更常规，鲁棒性的特性，使其对许多实际的噪声和不准确性来源有弹性。
Entangling gates are an essential component of quantum computers. However, generating high-fidelity gates, in a scalable manner, remains a major challenge in all quantum information processing platforms. Accordingly, improving the fidelity and robustness of these gates has been a research focus in recent years. In trapped ions quantum computers, entangling gates are performed by driving the normal modes of motion of the ion chain, generating a spin-dependent force. Even though there has been significant progress in increasing the robustness and modularity of these gates, they are still sensitive to noise in the intensity of the driving field. Here we supplement the conventional spin-dependent displacement with spin-dependent squeezing, which enables a gate that is robust to deviations in the amplitude of the driving field. We solve the general Hamiltonian and engineer its spectrum analytically. We also endow our gate with other, more conventional, robustness properties, making it resilient to many practical sources of noise and inaccuracies.
