Agmon-Type Estimates for a Class of Difference Operators

Agmon-Type Estimates for a Class of Difference Operators
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一类差分算子的 Agmon 型估计

DOI:
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发表时间:
2008
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通讯作者:
Elke Rosenberger
Elke Rosenberger
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文献类型:
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作者:
M. Klein;Elke Rosenberger

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摘要.我们分析了一般的自伴差分算子$$H_varepsilon = T_varepsilon + V_varepsilon,,{ m on},, ell^2((vareps {mathbb{Z}})^d)$$,其中Vε是单阱势,ε是小参数。我们构造了由Hε诱导的Finslerian距离d,并证明了短积分曲线是测地线.然后,我们表明,狄利克雷本征函数指数衰减的芬斯勒距离以及控制的速率。这类似于薛定谔算子的半经典Agmon估计。
Abstract.We analyze a general class of self-adjoint difference operators $$H_varepsilon = T_varepsilon + V_varepsilon,, { m on},, ell^2((varepsilon {mathbb{Z}})^d)$$, where Vε is a one-well potential and ε is a small parameter. We construct a Finslerian distance d induced by Hε and show that short integral curves are geodesics. Then we show that Dirichlet eigenfunctions decay exponentially with a rate controlled by the Finsler distance to the well. This is analog to semiclassical Agmon estimates for Schrödinger operators.