Polar bosons in one-dimensional disordered optical lattices
Polar bosons in one-dimensional disordered optical lattices
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DOI：
10.1103/physrevb.87.195101
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发表时间：
2012-03
影响因子：
3.7
通讯作者：
Xiaolong Deng;R. Citro;Edmond Orignac;A. Minguzzi;Luis Santos
中科院分区：
文献类型：
--
作者：
Xiaolong Deng;R. Citro;Edmond Orignac;A. Minguzzi;Luis Santos
分析了无序和准无序对光学晶格中超冷极性玻色子基态性质的影响。我们发现无序和格点间相互作用导致了丰富的相图。均匀无序导致具有有限宇称级数的霍尔丹绝缘体相，而密度波相在很弱无序时变成玻色玻璃。对于准无序，Haldane绝缘体与无中间临界区的有间隙的广义非混杂密度波相连。
We analyze the effects of disorder and quasi-disorder on the ground-state properties of ultra-cold polar bosons in optical lattices. We show that the interplay between disorder and inter-site interactions leads to rich phase diagrams. A uniform disorder leads to a Haldane-insulator phase with finite parity order, whereas the density-wave phase becomes a Bose-glass at very weak disorder. For quasi-disorder, the Haldane insulator connects with a gapped generalized incommesurate density wave without an intermediate critical region.