Study on measurement and control of an atomic ion using superconducting ion trap

本研究的目的是测量和延长具有自旋自由度的原子的自旋相干时间。作为第一个成果，我设计并建造了一个简单的冷却离子阱室，以实现原子离子的长时间相干。第二个成果是利用自旋回波技术成功地观测到了自旋2原子气态玻色-爱因斯坦凝聚体的自旋进动，提高了自旋相干时间。

The target of this research is to measure and prolong a spin coherence time of atom with spin degrees of freedom. As the first achievement, I designed and constructed the simple cooled ion trap chamber toward the realization of long time coherence of an atomic ion. As the second achievement, I succeeded in observing the spin precession of spin-2 atomic gaseous Bose-Einstein condensate and improving the spin coherence time by using the spin echo technique.