论文标题
抑制碱金属旋转在低磁场上的破裂性
Suppressing the Decoherence of Alkali-Metal Spins at Low Magnetic Fields
论文作者
论文摘要
电子旋转在碰撞期间或与外场的旋转自由度的相互作用是限制旋转气体相干时间的基本过程。我们通过实验研究在用n $ _2 $分子的二进制碰撞期间或通过吸收近谐振光的二进制碰撞期间，热铯旋转的破坏性。我们报告了通过低磁场下的任何一个过程对旋转分解速率抑制的数量级。这项工作扩展了将磁场用作控制旋钮的使用，不仅是为了抑制自旋交换弛豫（SELF）方案中随机旋转旋转过程的脱谐，而且还抑制了放松电子旋转而不是保存它们的过程。
Interactions of electron spins with rotational degrees of freedom during collisions or with external fields are fundamental processes that limit the coherence time of spin gases. We experimentally study the decoherence of hot cesium spins dominated by spin rotation-interaction during binary collisions with N$_2$ molecules or by absorption of near-resonant light. We report an order of magnitude suppression of the spin decoherence rate by either of those processes at low magnetic fields. This work extends the use of magnetic fields as a control knob, not only to suppress decoherence from random spin-conserving processes in the Spin-Exchange Relaxation Free (SERF) regime but also to suppress processes that relax electron spins rather than conserve them.
