论文标题
原子异核纺纱杆气中的碰撞自旋转移
Collisional spin transfer in an atomic heteronuclear spinor Bose gas
论文作者
论文摘要
我们观察到在非分类异核旋转旋转原子气中的旋转转移，该气体由一个小$^7 $ li的人群组成，并与$^{87} $ rb浴混合在一起，这两个元素都在其$ F = 1 $ hyperfine spin歧管中，并且在10 $ $ $ $ k的温度下。以非平衡性初始状态制备，$^7 $ li自旋分布通过不连贯的自旋变碰撞向稳态分布而发展。我们识别并测量所有三种类型的自旋依赖性异核碰撞的横截面，即自旋 - 交换，旋转混合和四极管 - 交换相互作用，并与异核$^7 $ li-$^7 $ li-$^{87} $ rb相互作用的预测达成一致。此外，我们观察到，可以通过改变与之相互作用的$^{87} $ rb旋转浴的组成来控制$^7 $ li Spinor气体的稳态。
We observe spin transfer within a non-degenerate heteronuclear spinor atomic gas comprised of a small $^7$Li population admixed with a $^{87}$Rb bath, with both elements in their $F=1$ hyperfine spin manifolds and at temperatures of 10's of $μ$K. Prepared in a non-equilibrium initial state, the $^7$Li spin distribution evolves through incoherent spin-changing collisions toward a steady-state distribution. We identify and measure the cross-sections of all three types of spin-dependent heteronuclear collisions, namely the spin-exchange, spin-mixing, and quadrupole-exchange interactions, and find agreement with predictions of heteronuclear $^7$Li-$^{87}$Rb interactions at low energy. Moreover, we observe that the steady state of the $^7$Li spinor gas can be controlled by varying the composition of the $^{87}$Rb spin bath with which it interacts.
