03-531 Yulia Karpeshina
Spectral Properties of the Periodic Magnetic Schr\"{o}dinger Operator in the High-Energy Region. Two-Dimensional Case. (797K, Postscript) Dec 9, 03
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Abstract. The goal is to investigate spectral properties of the operator $H=(-i\nabla +\vec a(x))^2+a_0(x)$ in the two-dimensional situation, $(\vec a(x), a_0(x))$ being periodic. We construct asymptotic formulae for Bloch eigenvalues and eigenfunctions in the high-energy region, describe properties of isoenergetic curves in the space of quasimomenta and give a new proof of the Bethe-Sommerfeld conjecture.

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