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arXiv 2008.05489cond-mat.mes-hallhep-thmath-phmath.AGmath.MPquant-ph
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双曲带理论

Hyperbolic band theory

Joseph Maciejko, Steven Rayan

摘要:

布洛赫波、晶体动量和能带的概念通常被认为是具有交换平移对称性的晶体材料的独特特征。最近实现的电路量子电动力学的双曲格的动机,我们利用代数几何的思想来构建第一个双曲推广的布洛赫理论,尽管没有交换平移对称。对于在双曲晶格势中传播的量子粒子,我们构造了一个连续的本征态族,该本征态在离散但非对易的双曲平移群(晶格的Fuchsian群)下获得布洛赫样相位因子。晶体动量的双曲模拟出现作为阿哈罗诺夫-玻姆相的集合,穿过与该组相关的高亏格黎曼曲面的循环。这种晶体动量存在于一个更高维的布里渊区环面中,即黎曼表面的雅可比矩阵,在其上可以计算出一组离散的连续能带。

英文摘要:

The notions of Bloch wave, crystal momentum, and energy bands are commonly regarded as unique features of crystalline materials with commutative translation symmetries. Motivated by the recent realization of hyperbolic lattices in circuit quantum electrodynamics, we exploit ideas from algebraic geometry to construct the first hyperbolic generalization of Bloch theory, despite the absence of commutative translation symmetries. For a quantum particle propagating in a hyperbolic lattice potential, we construct a continuous family of eigenstates that acquire Bloch-like phase factors under a discrete but noncommutative group of hyperbolic translations, the Fuchsian group of the lattice. A hyperbolic analog of crystal momentum arises as the set of Aharonov-Bohm phases threading the cycles of a higher-genus Riemann surface associated with this group. This crystal momentum lives in a higher-dimensional Brillouin zone torus, the Jacobian of the Riemann surface, over which a discrete set of continuous energy bands can be computed.

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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