论文标题
钻石中电子核自旋系统中Chern数的可调性可调节性
Controllable tunability of a Chern number within the electronic-nuclear spin system in diamond
论文作者
论文摘要
Chern数字在表征各种物理系统中的拓扑阶段时正在受到关注。但是，系统拓扑对外部扰动的韧性使得在不同阶段之间的过渡实验中的过渡变得具有挑战性。在这项研究中，我们证明了Chern数量从0到3的过渡，这些过渡是在钻石中与氮 - 胶菌（NV）中心相关的电子核自旋系统中合成的。 Chern数的特征是在控制哈密顿参数球体中包含的脱落数量。不同阶段之间的拓扑转变通过改变球体的半径和偏移来描述。我们表明，测得的拓扑相图不仅与数值计算一致，而且还可以映射到相互作用的三质量系统上。 NV系统还可以允许访问更高的Chern数字，这些数字可以应用于探索外来拓扑或拓扑量子信息。
Chern numbers are gaining traction as they characterize topological phases in various physical systems. However, the resilience of the system topology to external perturbations makes it challenging to experimentally investigate transitions between different phases. In this study, we demonstrate the transitions of Chern number from 0 to 3, synthesized in an electronic-nuclear spin system associated with the nitrogen-vacancy (NV) centre in diamond. The Chern number is characterized by the number of degeneracies enclosed in a control Hamiltonian parameter sphere. The topological transitions between different phases are depicted by varying the radius and offset of the sphere. We show that the measured topological phase diagram is not only consistent with the numerical calculations but can also be mapped onto an interacting three-qubit system. The NV system may also allow access to even higher Chern numbers, which can be applied to exploring exotic topology or topological quantum information.
