论文标题
固态自旋量子标题中的通用相干保护
Universal coherence protection in a solid-state spin qubit
论文作者
论文摘要
腐烂在很大程度上限制了量子的物理实现及其缓解对量子科学至关重要。在这里，我们构建了一个嵌入在脱糖保护的子空间中的稳健量子空间，该子空间是通过将施加的微波驱动器与碳化硅碳化物分裂缺陷的地下电子自旋杂交获得的。量子量受到磁性，电和温度波动的保护，这几乎解释了固态下的所有相关的退化通道。这最终达到了Qubit的不均匀性时间的增加，以上超过四个数量级（达到> 22毫秒），而其Hahn-Echo相干时间接近64毫秒。该结果几乎不需要关键的与平台无关的组件，这表明在多种量子体系结构中可以实现实质性的连贯性改进。
Decoherence largely limits the physical realization of qubits and its mitigation is critical to quantum science. Here, we construct a robust qubit embedded in a decoherence-protected subspace, obtained by hybridizing an applied microwave drive with the ground-state electron spin of a silicon carbide divacancy defect. The qubit is protected from magnetic, electric, and temperature fluctuations, which account for nearly all relevant decoherence channels in the solid state. This culminates in an increase of the qubit's inhomogeneous dephasing time by over four orders of magnitude (to > 22 milliseconds), while its Hahn-echo coherence time approaches 64 milliseconds. Requiring few key platform-independent components, this result suggests that substantial coherence improvements can be achieved in a wide selection of quantum architectures.
