Eigenvalue Asymptotics for the Schr\"odinger Operator with a Matrix   Potential in a Single Resonance Domain
  We consider a Schr\"odinger Operator with a matrix potential defined in $L_2^m(F)$ by the differential expression\begin{equation*}   L(\phi(x))=(-\Delta+V(x))\phi(x)   \end{equation*}and the Neumann boundary condition, where $F$ is the $d$ dimensional rectangle and $V$ is a martix potential, $m\geqslant 2, d\geqslant 2$. We obtain the asymptotic formulas of arbitrary order for the single resonance eigenvalues of the Schr\"odinger operator in $L_2^m(F)$. 
Sedef Karak{\l}l{\l}\c{c}, Setenay Akduman
math.SP