论文标题
带有飞行域壁柜的磁性跑道上的量子计算
Quantum computing on magnetic racetracks with flying domain wall qubits
论文作者
论文摘要
磁性赛道上的域壁（DWS）是Spintronics领域的核心，为经典信息处理提供了一个基本元素。在这里，我们表明移动DWS还为大型量子计算机提供了蓝图。值得注意的是，这些DW Qubits展示了出色的多功能性，不仅可以用作固定量子位，而且还可以用超快的方式扮演固态飞行量子台的角色。我们估计DW量子位是长期寿命的，因为它们可以在甜美的位置进行操作以减少潜在的噪声源。单量门门是通过移动DW来实现的，并且两分的纠结门利用了不同DW之间的自然出现的相互作用。这些大门足以用于通用量子计算，与赛道记忆的当前最新实验完全兼容。此外，我们讨论了量子读数和初始化的可能策略，并基于磁性赛道上的移动拓扑纹理铺平了通往未来量子计算机的道路。
Domain walls (DWs) on magnetic racetracks are at the core of the field of spintronics, providing a basic element for classical information processing. Here, we show that mobile DWs also provide a blueprint for large-scale quantum computers. Remarkably, these DW qubits showcase exceptional versatility, serving not only as stationary qubits, but also performing the role of solid-state flying qubits that can be shuttled in an ultrafast way. We estimate that the DW qubits are long-lived because they can be operated at sweet spots to reduce potential noise sources. Single-qubit gates are implemented by moving the DW, and two-qubit entangling gates exploit naturally emerging interactions between different DWs. These gates, sufficient for universal quantum computing, are fully compatible with current state-of-the-art experiments on racetrack memories. Further, we discuss possible strategies for qubit readout and initialization, paving the way toward future quantum computers based on mobile topological textures on magnetic racetracks.
