Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4591255 | Journal of Functional Analysis | 2009 | 45 Pages |
Abstract
For a general class of difference operators Hε=Tε+Vε on ℓ2(d(εZ)), where Vε is a multi-well potential and ε is a small parameter, we analyze the asymptotic behavior as ε→0 of the (low-lying) eigenvalues and eigenfunctions. We show that the first n eigenvalues of Hε converge to the first n eigenvalues of the direct sum of harmonic oscillators on Rd located at the several wells. Our proof is microlocal.
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