论文标题
碱金属原子的光学保护免受自旋松弛
Optical protection of alkali-metal atoms from spin relaxation
论文作者
论文摘要
我们提出了一种光学技术，用于使用单个非谐振激光束在碱金属旋转中抑制松弛。该方法利用了一种物理机制，该物理机制可以同步两个超精细歧管中的Larmor进动，从而保护磁相干性免受旋转交换和其他超精细变化的碰撞引起的松弛。我们在实验中证明了温暖的剖腹蒸气的破裂性降低了9倍，从而同时保护了自旋交换松弛和对涂层细胞壁的部分去极化。该技术显着增强了自旋进动质量因子，即使在频繁的碰撞下，也可以保持稳定的旋转磁比独立于自旋极化。这些发现为减轻基于碱基准的应用和实验，尤其是在抗释放涂层的细胞中的途径提供了一种途径。
We present an optical technique for suppressing relaxation in alkali-metal spins using a single off-resonant laser beam. The method harnesses a physical mechanism that synchronizes Larmor precession in the two hyperfine manifolds, protecting magnetic coherence from relaxation caused by spin-exchange and other hyperfine-changing collisions. We experimentally demonstrate up to a ninefold reduction in decoherence of warm cesium vapor, achieving simultaneous protection from both spin-exchange relaxation and partial depolarization from coated cell walls. The technique substantially enhances the spin precession quality factor and maintains a stable gyromagnetic ratio independent of spin polarization, even under frequent collisions. These findings offer a pathway for mitigating dominant relaxation channels in alkali-metal-based applications and experiments, particularly in anti-relaxation-coated cells.
