# American Institute of Mathematical Sciences

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August  2009, 24(3): 933-978. doi: 10.3934/dcds.2009.24.933

## An eigenvalue variation problem of magnetic Schrödinger operator in three dimensions

 1 Department of Mathematics, East China Normal University, Shanghai 200062, China

Received  August 2007 Revised  June 2008 Published  April 2009

This paper concerns the lowest eigenvalue $\mu(b\N^Q)$ of the Schrödinger operator in three-dimensions with a magnetic potential $b\N^Q$, where the vector field $\N^Q$ depends on a matrix $Q$ varying in $SO(3)$ and $b$ is a real parameter. The eigenvalue variation problem is to minimize the lowest eigenvalue among all $Q$ in $SO(3)$. This problem arises in the phase transitions of smectic liquid crystals. We give an estimate of the minimum value inf${\mu(b\N^Q):~Q\in SO(3)\}$ for large $b$, and examine its dependence on geometry of the domain surface.
Citation: Xing-Bin Pan. An eigenvalue variation problem of magnetic Schrödinger operator in three dimensions. Discrete & Continuous Dynamical Systems - A, 2009, 24 (3) : 933-978. doi: 10.3934/dcds.2009.24.933
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