论文标题
原子之间的磁性feshbach共振在$^2 $ s和$^3 $ p $ _0 $状态：机制和对原子属性的依赖
Magnetic Feshbach resonances between atoms in $^2$S and $^3$P$_0$ states: mechanisms and dependence on atomic properties
论文作者
论文摘要
磁性可调的Feshbach共振存在于原子之间的超低碰撞中，$^2 $ s和$^3 $ p $ _0 $状态，例如碱金属原子在时钟状态下与yb或sr碰撞。我们研究了这些共振的机制，并确定了对它们负责的碰撞汉密尔顿人中的术语。它们涉及开放频道和封闭频道之间的间接耦合，通过涉及原子中的中间渠道$^3 $ p $ _1 $状态。共振宽度通常与磁场的平方成正比，当背景散射长度较大时，谐振宽度会得到强烈的增强。对于任何给定的原子，可以通过选择$^3 $ p $ _0 $ ATOM的不同同位素来离散地调整散射长度。对于碱金属原子和YB或SR的每种组合，我们考虑找到一种同位素组合的前景，该组合既具有较大的背景散射长度，又在高且在实验上可访问的场。我们得出结论，$^{87} $ rb+yb，cs+yb和$^{85} $ rb+sr是特别有希望的组合。
Magnetically tunable Feshbach resonances exist in ultracold collisions between atoms in $^2$S and $^3$P$_0$ states, such as an alkali-metal atom colliding with Yb or Sr in a clock state. We investigate the mechanisms of these resonances and identify the terms in the collision Hamiltonian responsible for them. They involve indirect coupling between the open and closed channels, via intermediate channels involving atoms in $^3$P$_1$ states. The resonance widths are generally proportional to the square of the magnetic field and are strongly enhanced when the magnitude of the background scattering length is large. For any given pair of atoms, the scattering length can be tuned discretely by choosing different isotopes of the $^3$P$_0$ atom. For each combination of an alkali-metal atom and either Yb or Sr, we consider the prospects of finding an isotopic combination that has both a large background scattering length and resonances at high but experimentally accessible field. We conclude that $^{87}$Rb+Yb, Cs+Yb and $^{85}$Rb+Sr are particularly promising combinations.
