期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.215302
关键词
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资金
- EPSRC [EP/F032773/1]
- EPSRC [EP/F032773/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F032773/1] Funding Source: researchfish
Motivated by new capabilities to realize artificial gauge fields in ultracold atomic systems, and by their potential to access correlated topological phases in lattice systems, we present a new strategy for designing topologically nontrivial band structures. Our approach is simple and direct: it amounts to considering tight-binding models directly in reciprocal space. These models naturally cause atoms to experience highly uniform magnetic flux density and lead to topological bands with very narrow dispersion, without fine-tuning of parameters. Further, our construction immediately yields instances of optical Chern lattices, as well as band structures with Chern numbers of magnitude larger than one.
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