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arXiv 1812.03323math-phmath.MP
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具有PT对称性的一维半经典Bogoliubov-de Gennes哈密顿量:广义Bohr-Sommerfeld量子化定则

The one dimensional semi-classical Bogoliubov-de Gennes Hamiltonian with PT symmetry: generalized Bohr-Sommerfeld quantization rules

Abdelwaheb Ifa, Michel Rouleux

摘要:

提出了一种从超导电性出发计算一维Bogoliubov-de Gennes(BdG)哈密顿量的半经典谱的一阶渐近性质的方法,该方法模拟了电子/空穴通过两个SNS结的散射.这包括:1)在结点处的分支点附近将系统简化为Weber方程,2)构造微局部解的纤维丛的局部截面,3)针对与微局部Wronskians相关联的“通量范数”对这些解进行归一化,4)在保持通量范数不变的规范群中找到相对单值矩阵,5)由此我们推导出Bohr-Sommerfeld(BS)量子化规则,当微局部解的纤维丛(取决于能量参数E)具有平凡完整性时,该规则精确地成立。这样一个半经典的解释揭示了与单值性有关的有趣的连续对称性。

英文摘要:

We present a method for computing first order asymptotics of semiclassical spectra for 1-D Bogoliubov-de Gennes (BdG) Hamiltonian from Supraconductivity, which models the electron/hole scattering through two SNS junctions. This involves: 1) reducing the system to Weber equation near the branching point at the junctions, 2) constructing local sections of the fibre bundle of microlocal solutions, 3) normalizing these solutions for the "flux norm" associated to the microlocal Wronskians, 4) finding the relative monodromy matrices in the gauge group that leaves invariant the flux norm, 5) from this we deduce Bohr-Sommerfeld (BS) quantization rules that hold precisely when the fibre bundle of microlocal solutions (depending on the energy parameter E) has trivial holonomy. Such a semi-classical treatement reveals interesting continuous symetries related to monodromy.

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