论文标题
通过瞬时检索宽带宽度原子磁力测定法
Wide-bandwidth atomic magnetometry via instantaneous-phase retrieval
论文作者
论文摘要
我们开发并演示了一种新协议，该方案允许在原子磁力测定法上传感磁场。到目前为止，原子磁力测定法的所示带宽已被限制为比磁场中原子旋转的天然进动的慢慢 - -larmor频率。我们展示了一种新方法，该方法跟踪原子自旋的瞬时相，以测量比Larmor频率高的频率高五十倍的任意调节磁场。通过访问该制度，我们在四十年的频率上展示了磁场测量值，高达400 kHz，比传统的原子磁力计宽三个数量级。此外，我们证明我们的协议可以线性检测瞬态幅度比常规方法高100倍。我们通过测量具有广泛且动力学的频谱的磁场来突出该技术的带宽和动态范围。
We develop and demonstrate a new protocol that allows sensing of magnetic fields in an extra-ordinary regime for atomic magnetometry. Until now, the demonstrated bandwidth for atomic magnetometry has been constrained to be slower than the natural precession of atomic spins in a magnetic field---the Larmor frequency. We demonstrate a new approach that tracks the instantaneous phase of atomic spins to measure arbitrarily modulated magnetic fields with frequencies up to fifty times higher than the Larmor frequency. By accessing this regime, we demonstrate magnetic-field measurements across four decades in frequency up to 400 kHz, over three orders of magnitude wider than conventional atomic magnetometers. Furthermore, we demonstrate that our protocol can linearly detect transient fields 100--fold higher in amplitude than conventional methods. We highlight the bandwidth and dynamic range of the technique by measuring a magnetic field with a broad and dynamical spectrum.
