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arXiv 1206.0191cond-mat.quant-gas
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一维光晶格中二分量偶极费米子的Phase diagram

Phase diagram of two-component dipolar fermions in one-dimensional optical lattices

Theja N. De Silva

摘要:

从理论上绘制了一维晶格中相互作用偶极费米子的基态相图。利用玻色化理论在半填充的弱耦合极限,我们表明,可以构建一个丰富的相图通过改变晶格取向和极化方向的偶极子之间的角度。在强耦合极限下,在一般填充因子下,我们采用变分方法,发现维格纳晶体相的出现。结构因子提供了清晰的维格纳晶体相的粒子有序的签名。

英文摘要:

We theoretically map out the ground state phase diagram of interacting dipolar fermions in one-dimensional lattice. Using a bosonization theory in the weak coupling limit at half filing, we show that one can construct a rich phase diagram by changing the angle between the lattice orientation and the polarization direction of the dipoles. In the strong coupling limit, at a general filing factor, we employ a variational approach and find that the emergence of a Wigner crystal phases. The structure factor provides clear signatures of the particle ordering in the Wigner crystal phases.

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