论文标题
令人沮丧的磁铁，没有玻色弹梯子的几何挫败感
Frustrated magnets without geometrical frustration in bosonic flux ladders
论文作者
论文摘要
我们提出了一种方案，以在光学晶格中使用超电原子的沮丧的玻色式模型，包括沮丧的Spin-1/2量子XX模型。我们的方法基于一个接近$π$的磁通梯子，带有一个真实的和一个合成的自旋尺寸。尽管该系统没有几何挫败感，但我们表明，在低能量下，它将其映射到有效的三角梯子中，带有交错的通量，用于合成隧道的特定值。我们在数值上研究了其丰富的相图，并表明它包含键盘的波和手性超流体相。我们的方案在最小的实验复杂性设置下，可以访问最小的沮丧磁铁实例，而无需真正的几何挫败感。
We propose a scheme to realize a frustrated Bose-Hubbard model with ultracold atoms in an optical lattice that comprises the frustrated spin-1/2 quantum XX model. Our approach is based on a square ladder of magnetic flux close to $π$ with one real and one synthetic spin dimension. Although this system does not have geometrical frustration, we show that at low energies it maps into an effective triangular ladder with staggered fluxes for specific values of the synthetic tunneling. We numerically investigate its rich phase diagram and show that it contains bond-ordered-wave and chiral superfluid phases. Our scheme gives access to minimal instances of frustrated magnets without the need for real geometrical frustration, in a setup of minimal experimental complexity.
