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arXiv 1303.2185math.SPcond-mat.mes-hallmath-phmath.MP
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一维Dirac算子束的特征值

Eigenvalues of a one-dimensional Dirac operator pencil

Daniel M. Elton, Michael Levitin, Iosif Polterovich

摘要:

研究了一维Dirac算子束的谱,其中势前的耦合常数被认为是谱参数。受最近石墨烯波导研究的启发,我们重点研究了Dirac算子的核包含平方可积〔的〕的耦合常数的值。在物理学文献中,这样的函数被称为受限零模。得到了引起零模的耦合常数的渐近分布的几个结果。特别是,我们表明,这种分布取决于在一个微妙的方式上的符号变化和存在的差距的潜力。令人惊讶的是,它还取决于由势确定的某些量的算术性质。我们进一步观察到,可变符号的潜力可能会产生复杂的本征值的运营商束。给出了一些例子和数值计算来说明这些现象。

英文摘要:

We study the spectrum of a one-dimensional Dirac operator pencil, with a coupling constant in front of the potential considered as the spectral parameter. Motivated by recent investigations of graphene waveguides, we focus on the values of the coupling constant for which the kernel of the Dirac operator contains a square integrable function. In physics literature such a function is called a confined zero mode. Several results on the asymptotic distribution of coupling constants giving rise to zero modes are obtained. In particular, we show that this distribution depends in a subtle way on the sign variation and the presence of gaps in the potential. Surprisingly, it also depends on the arithmetic properties of certain quantities determined by the potential. We further observe that variable sign potentials may produce complex eigenvalues of the operator pencil. Some examples and numerical calculations illustrating these phenomena are presented.

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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