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arXiv 1909.00409math.DGmath.DSmath.SP
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亚Riemannian geometry中的谱和异常:4D准接触情况

Spectrum and abnormals in sub-Riemannian geometry: the 4D quasi-contact case

Nikhil Savale

摘要:

我们证明了四维准接触情形下次黎曼(sR)Laplacian的谱与动力学之间的关系,包括波迹展开、尖锐/改进的Weyl定律、奇性传播和量子遍历性.一个关键的作用,在所有的结果中发挥了异常测地线的存在,并代表了第一次出现这些次黎曼谱几何。

英文摘要:

We prove several relations between spectrum and dynamics including wave trace expansion, sharp/improved Weyl laws, propagation of singularities and quantum ergodicity for the sub-Riemannian (sR) Laplacian in the four dimensional quasi-contact case. A key role in all results is played by the presence of abnormal geodesics and represents the first such appearance of these in sub-Riemannian spectral geometry.

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