论文标题
直接控制基于NV中心的冷原子实验的高磁场
Direct control of high magnetic fields for cold atom experiments based on NV centers
论文作者
论文摘要
在冷原子气体中，原子之间的相互作用可以通过外部磁场直接控制。通常通过通过一对产生大偏置场的Helmholtz线圈稳定电流来间接地进行磁场控制。在这里，我们通过直接反馈方案克服了这种间接控制的局限性，该方案基于充当磁场传感器的氮气接种中心。这使我们可以在24小时内测量和稳定4.66 mt的磁场，至12 nt RMS噪声，以1 Hz的带宽测量。在集成时间20分钟后，我们的控制能力大于1 ppm，从而确保了实验的长期稳定性。这种方法将直接磁场控制扩展到强磁场，这可以在此制度中实现新的精确量子模拟。
In cold atomic gases the interactions between the atoms are directly controllable through external magnetic fields. The magnetic field control is typically performed indirectly by stabilizing the current through a pair of Helmholtz coils, which produce this large bias field. Here, we overcome the limitations of such an indirect control through a direct feedback scheme, which is based on nitrogen-vacancy centers acting as a magnetic field sensor. This allows us to measure and stabilize fields of 4.66 mT down to 12 nT RMS noise over the course of 24 h, measured on a 1 Hz bandwidth. We achieve a control of better than 1 ppm after 20 minutes of integration time, ensuring high long-term stability for experiments. This approach extends direct magnetic field control to strong magnetic fields, which could enable new precise quantum simulations in this regime.
