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arXiv 1707.03225cond-mat.quant-gas
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量子链梯中的隐序和对称性保护拓扑态

Hidden order and symmetry protected topological states in quantum link ladders

Lorenzo Cardarelli, Sebastian Greschner, Luis Santos

摘要:

我们发现,而自旋1/2一维U(1)量子链接模型(QLM)是拓扑平凡的,当实现在梯形晶格这些模型可能会提出一个有趣的基态相图,其中包括一个对称性保护拓扑(SPT)相,可以很容易地揭示通过分析长程字符串自旋相关沿梯子腿。我们提出了一个简单的方案,实现自旋1/2 U(1)QLM基于单组分费米子加载在一个光晶格的s-和p-带,表明SPT相可以通过绝热制备实验实现。

英文摘要:

We show that whereas spin-1/2 one-dimensional U(1) quantum-link models (QLMs) are topologically trivial, when implemented in ladder-like lattices these models may present an intriguing ground-state phase diagram, which includes a symmetry protected topological (SPT) phase that may be readily revealed by analyzing long-range string spin correlations along the ladder legs. We propose a simple scheme for the realization of spin-1/2 U(1) QLMs based on single-component fermions loaded in an optical lattice with s- and p-bands, showing that the SPT phase may be experimentally realized by adiabatic preparation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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