Spectral shift function for operators with crossed magnetic and electric fields

Details Spectral shift function for operators with crossed magnetic and electric fields Spectral shift function for operators with crossed magnetic and electric fields

2009-07-13

arxiv.org/abs/0907.2164v4

Physics

Mathematical Physics

Scientific paper

We obtain a representation formula for the derivative of the spectral shift function $\xi(\lambda; B, \epsilon)$ related to the operators $H_0(B,\epsilon) = (D_x - By)^2 + D_y^2 + \epsilon x$ and $H(B, \epsilon) = H_0(B, \epsilon) + V(x,y), \: B > 0, \epsilon > 0$. We establish a limiting absorption principle for $H(B, \epsilon)$ and an estimate ${\mathcal O}(\epsilon^{n-2})$ for $\xi'(\lambda; B, \epsilon)$, provided $\lambda \notin \sigma(Q)$, where $Q = (D_x - By)^2 + D_y^2 + V(x,y).$

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