Magnetic Gradiometer for the Detection of Zero- to Ultralow-Field Nuclear Magnetic Resonance

As a complement to conventional high-field nuclear magnetic resonance (NMR), zero- and ultralow-field (ZULF) NMR has important applications in chemical analysis and fundamental physics. Breakthroughs in this field are being thwarted in part by intrinsic susceptibility to magnetic field noise. This study uses a two-channel atomic magnetometer to eliminate common-mode magnetic field noise. This approach could promote the engineering of a portable ZULF-NMR system, and provide a sensitive method to probe the frontiers of fundamental physics, such as exotic spin-dependent interactions and molecular chirality.