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arXiv 2202.02208math.APmath.PRmath.SP
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具有退化漂移的亚稳扩散

Metastable diffusions with degenerate drifts

Marouane Assal, Jean-Francois Bony, Laurent Michel

摘要:

本文研究了半经典Witten Laplacian $Δ_{f}$的谱,它与${\mathbb R}^d$上的光滑函数$f$相关联.我们假设$f$是一个限制Morse-Bott函数。在此假设下,我们表明,$Δ_{f}$承认指数小的特征值分离的其余部分的频谱。此外,我们还建立了这些特征值的Eyring-Kramers公式。我们的方法是基于微局部结构的准模附近的临界子流形。

英文摘要:

We study the spectrum of the semiclassical Witten Laplacian $Δ_{f}$ associated to a smooth function $f$ on ${\mathbb R}^d$. We assume that $f$ is a confining Morse--Bott function. Under this assumption we show that $Δ_{f}$ admits exponentially small eigenvalues separated from the rest of the spectrum. Moreover, we establish Eyring-Kramers formula for these eigenvalues. Our approach is based on microlocal constructions of quasimodes near the critical submanifolds.

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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